Function(
 Function {
  head: Destructured(
   FunctionHeadDestructured {
    ellipsis: true,
    identifier: None,
    arguments: [
     FunctionHeadDestructuredArgument {
      identifier: "lib",
      default: None,
     },
     FunctionHeadDestructuredArgument {
      identifier: "config",
      default: None,
     },
    ],
   },
  ),
  body: Map(
   Map {
    recursive: false,
    bindings: [
     KeyValue(
      BindingKeyValue {
       from: [
        Raw(
         PartRaw {
          content: "options",
          span: Span {
           start: Position {
            line: 2,
            column: 3,
           },
           end: Position {
            line: 2,
            column: 10,
           },
          },
         },
        ),
        Raw(
         PartRaw {
          content: "isLazy",
          span: Span {
           start: Position {
            line: 2,
            column: 11,
           },
           end: Position {
            line: 2,
            column: 17,
           },
          },
         },
        ),
       ],
       to: FunctionApplication(
        FunctionApplication {
         function: PropertyAccess(
          PropertyAccess {
           expression: Identifier(
            Identifier {
             id: "lib",
             span: Span {
              start: Position {
               line: 2,
               column: 20,
              },
              end: Position {
               line: 2,
               column: 23,
              },
             },
            },
           ),
           attribute_path: [
            Raw(
             PartRaw {
              content: "mkOption",
              span: Span {
               start: Position {
                line: 2,
                column: 24,
               },
               end: Position {
                line: 2,
                column: 32,
               },
              },
             },
            ),
           ],
           default: None,
          },
         ),
         arguments: [
          Map(
           Map {
            recursive: false,
            bindings: [
             KeyValue(
              BindingKeyValue {
               from: [
                Raw(
                 PartRaw {
                  content: "default",
                  span: Span {
                   start: Position {
                    line: 3,
                    column: 5,
                   },
                   end: Position {
                    line: 3,
                    column: 12,
                   },
                  },
                 },
                ),
               ],
               to: UnaryOperation(
                UnaryOperation {
                 operator: Not,
                 operand: HasAttribute(
                  HasAttribute {
                   expression: PropertyAccess(
                    PropertyAccess {
                     expression: Identifier(
                      Identifier {
                       id: "config",
                       span: Span {
                        start: Position {
                         line: 3,
                         column: 17,
                        },
                        end: Position {
                         line: 3,
                         column: 23,
                        },
                       },
                      },
                     ),
                     attribute_path: [
                      Raw(
                       PartRaw {
                        content: "value",
                        span: Span {
                         start: Position {
                          line: 3,
                          column: 24,
                         },
                         end: Position {
                          line: 3,
                          column: 29,
                         },
                        },
                       },
                      ),
                     ],
                     default: None,
                    },
                   ),
                   attribute_path: [
                    Raw(
                     PartRaw {
                      content: "foo",
                      span: Span {
                       start: Position {
                        line: 3,
                        column: 32,
                       },
                       end: Position {
                        line: 3,
                        column: 35,
                       },
                      },
                     },
                    ),
                   ],
                  },
                 ),
                 span: Span {
                  start: Position {
                   line: 3,
                   column: 15,
                  },
                  end: Position {
                   line: 3,
                   column: 35,
                  },
                 },
                },
               ),
              },
             ),
            ],
            span: Span {
             start: Position {
              line: 2,
              column: 33,
             },
             end: Position {
              line: 4,
              column: 4,
             },
            },
           },
          ),
         ],
        },
       ),
      },
     ),
     KeyValue(
      BindingKeyValue {
       from: [
        Raw(
         PartRaw {
          content: "config",
          span: Span {
           start: Position {
            line: 6,
            column: 3,
           },
           end: Position {
            line: 6,
            column: 9,
           },
          },
         },
        ),
        Raw(
         PartRaw {
          content: "value",
          span: Span {
           start: Position {
            line: 6,
            column: 10,
           },
           end: Position {
            line: 6,
            column: 15,
           },
          },
         },
        ),
        Raw(
         PartRaw {
          content: "bar",
          span: Span {
           start: Position {
            line: 6,
            column: 16,
           },
           end: Position {
            line: 6,
            column: 19,
           },
          },
         },
        ),
       ],
       to: FunctionApplication(
        FunctionApplication {
         function: Identifier(
          Identifier {
           id: "throw",
           span: Span {
            start: Position {
             line: 6,
             column: 22,
            },
            end: Position {
             line: 6,
             column: 27,
            },
           },
          },
         ),
         arguments: [
          String(
           String_ {
            parts: [
             Raw(
              PartRaw {
               content: "is not lazy",
               span: Span {
                start: Position {
                 line: 6,
                 column: 29,
                },
                end: Position {
                 line: 6,
                 column: 40,
                },
               },
              },
             ),
            ],
            span: Span {
             start: Position {
              line: 6,
              column: 28,
             },
             end: Position {
              line: 6,
              column: 41,
             },
            },
           },
          ),
         ],
        },
       ),
      },
     ),
    ],
    span: Span {
     start: Position {
      line: 1,
      column: 23,
     },
     end: Position {
      line: 7,
      column: 2,
     },
    },
   },
  ),
  span: Span {
   start: Position {
    line: 1,
    column: 1,
   },
   end: Position {
    line: 7,
    column: 2,
   },
  },
 },
)