JsModule {
    bom_token: missing (optional),
    interpreter_token: missing (optional),
    directives: JsDirectiveList [],
    items: JsModuleItemList [
        JsExpressionStatement {
            expression: JsCallExpression {
                callee: JsParenthesizedExpression {
                    l_paren_token: L_PAREN@0..1 "(" [] [],
                    expression: JsArrowFunctionExpression {
                        async_token: missing (optional),
                        type_parameters: TsTypeParameters {
                            l_angle_token: L_ANGLE@1..2 "<" [] [],
                            items: TsTypeParameterList [
                                TsTypeParameter {
                                    modifiers: TsTypeParameterModifierList [],
                                    name: TsTypeParameterName {
                                        ident_token: IDENT@2..3 "A" [] [],
                                    },
                                    constraint: missing (optional),
                                    default: missing (optional),
                                },
                                COMMA@3..5 "," [] [Whitespace(" ")],
                                TsTypeParameter {
                                    modifiers: TsTypeParameterModifierList [],
                                    name: TsTypeParameterName {
                                        ident_token: IDENT@5..6 "B" [] [],
                                    },
                                    constraint: missing (optional),
                                    default: missing (optional),
                                },
                            ],
                            r_angle_token: R_ANGLE@6..7 ">" [] [],
                        },
                        parameters: JsParameters {
                            l_paren_token: L_PAREN@7..8 "(" [] [],
                            items: JsParameterList [],
                            r_paren_token: R_PAREN@8..10 ")" [] [Whitespace(" ")],
                        },
                        return_type_annotation: missing (optional),
                        fat_arrow_token: FAT_ARROW@10..13 "=>" [] [Whitespace(" ")],
                        body: JsFunctionBody {
                            l_curly_token: L_CURLY@13..14 "{" [] [],
                            directives: JsDirectiveList [],
                            statements: JsStatementList [],
                            r_curly_token: R_CURLY@14..15 "}" [] [],
                        },
                    },
                    r_paren_token: R_PAREN@15..16 ")" [] [],
                },
                optional_chain_token: QUESTIONDOT@16..18 "?." [] [],
                type_arguments: TsTypeArguments {
                    l_angle_token: L_ANGLE@18..19 "<" [] [],
                    ts_type_argument_list: TsTypeArgumentList [
                        TsReferenceType {
                            name: JsReferenceIdentifier {
                                value_token: IDENT@19..20 "A" [] [],
                            },
                            type_arguments: missing (optional),
                        },
                        COMMA@20..22 "," [] [Whitespace(" ")],
                        TsReferenceType {
                            name: JsReferenceIdentifier {
                                value_token: IDENT@22..23 "B" [] [],
                            },
                            type_arguments: missing (optional),
                        },
                    ],
                    r_angle_token: R_ANGLE@23..24 ">" [] [],
                },
                arguments: JsCallArguments {
                    l_paren_token: L_PAREN@24..25 "(" [] [],
                    args: JsCallArgumentList [],
                    r_paren_token: R_PAREN@25..26 ")" [] [],
                },
            },
            semicolon_token: SEMICOLON@26..27 ";" [] [],
        },
    ],
    eof_token: EOF@27..28 "" [Newline("\n")] [],
}

0: JS_MODULE@0..28
  0: (empty)
  1: (empty)
  2: JS_DIRECTIVE_LIST@0..0
  3: JS_MODULE_ITEM_LIST@0..27
    0: JS_EXPRESSION_STATEMENT@0..27
      0: JS_CALL_EXPRESSION@0..26
        0: JS_PARENTHESIZED_EXPRESSION@0..16
          0: L_PAREN@0..1 "(" [] []
          1: JS_ARROW_FUNCTION_EXPRESSION@1..15
            0: (empty)
            1: TS_TYPE_PARAMETERS@1..7
              0: L_ANGLE@1..2 "<" [] []
              1: TS_TYPE_PARAMETER_LIST@2..6
                0: TS_TYPE_PARAMETER@2..3
                  0: TS_TYPE_PARAMETER_MODIFIER_LIST@2..2
                  1: TS_TYPE_PARAMETER_NAME@2..3
                    0: IDENT@2..3 "A" [] []
                  2: (empty)
                  3: (empty)
                1: COMMA@3..5 "," [] [Whitespace(" ")]
                2: TS_TYPE_PARAMETER@5..6
                  0: TS_TYPE_PARAMETER_MODIFIER_LIST@5..5
                  1: TS_TYPE_PARAMETER_NAME@5..6
                    0: IDENT@5..6 "B" [] []
                  2: (empty)
                  3: (empty)
              2: R_ANGLE@6..7 ">" [] []
            2: JS_PARAMETERS@7..10
              0: L_PAREN@7..8 "(" [] []
              1: JS_PARAMETER_LIST@8..8
              2: R_PAREN@8..10 ")" [] [Whitespace(" ")]
            3: (empty)
            4: FAT_ARROW@10..13 "=>" [] [Whitespace(" ")]
            5: JS_FUNCTION_BODY@13..15
              0: L_CURLY@13..14 "{" [] []
              1: JS_DIRECTIVE_LIST@14..14
              2: JS_STATEMENT_LIST@14..14
              3: R_CURLY@14..15 "}" [] []
          2: R_PAREN@15..16 ")" [] []
        1: QUESTIONDOT@16..18 "?." [] []
        2: TS_TYPE_ARGUMENTS@18..24
          0: L_ANGLE@18..19 "<" [] []
          1: TS_TYPE_ARGUMENT_LIST@19..23
            0: TS_REFERENCE_TYPE@19..20
              0: JS_REFERENCE_IDENTIFIER@19..20
                0: IDENT@19..20 "A" [] []
              1: (empty)
            1: COMMA@20..22 "," [] [Whitespace(" ")]
            2: TS_REFERENCE_TYPE@22..23
              0: JS_REFERENCE_IDENTIFIER@22..23
                0: IDENT@22..23 "B" [] []
              1: (empty)
          2: R_ANGLE@23..24 ">" [] []
        3: JS_CALL_ARGUMENTS@24..26
          0: L_PAREN@24..25 "(" [] []
          1: JS_CALL_ARGUMENT_LIST@25..25
          2: R_PAREN@25..26 ")" [] []
      1: SEMICOLON@26..27 ";" [] []
  4: EOF@27..28 "" [Newline("\n")] []