JsModule {
    bom_token: missing (optional),
    interpreter_token: missing (optional),
    directives: JsDirectiveList [],
    items: JsModuleItemList [
        TsInterfaceDeclaration {
            interface_token: INTERFACE_KW@0..10 "interface" [] [Whitespace(" ")],
            id: TsIdentifierBinding {
                name_token: IDENT@10..12 "A" [] [Whitespace(" ")],
            },
            type_parameters: missing (optional),
            extends_clause: missing (optional),
            l_curly_token: L_CURLY@12..13 "{" [] [],
            members: TsTypeMemberList [],
            r_curly_token: R_CURLY@13..14 "}" [] [],
        },
        TsInterfaceDeclaration {
            interface_token: INTERFACE_KW@14..25 "interface" [Newline("\n")] [Whitespace(" ")],
            id: TsIdentifierBinding {
                name_token: IDENT@25..27 "B" [] [Whitespace(" ")],
            },
            type_parameters: missing (optional),
            extends_clause: TsExtendsClause {
                extends_token: EXTENDS_KW@27..35 "extends" [] [Whitespace(" ")],
                types: TsTypeList [
                    TsNameWithTypeArguments {
                        name: JsReferenceIdentifier {
                            value_token: IDENT@35..36 "A" [] [],
                        },
                        type_arguments: missing (optional),
                    },
                    COMMA@36..38 "," [] [Whitespace(" ")],
                    missing element,
                ],
            },
            l_curly_token: L_CURLY@38..39 "{" [] [],
            members: TsTypeMemberList [],
            r_curly_token: R_CURLY@39..40 "}" [] [],
        },
    ],
    eof_token: EOF@40..41 "" [Newline("\n")] [],
}

0: JS_MODULE@0..41
  0: (empty)
  1: (empty)
  2: JS_DIRECTIVE_LIST@0..0
  3: JS_MODULE_ITEM_LIST@0..40
    0: TS_INTERFACE_DECLARATION@0..14
      0: INTERFACE_KW@0..10 "interface" [] [Whitespace(" ")]
      1: TS_IDENTIFIER_BINDING@10..12
        0: IDENT@10..12 "A" [] [Whitespace(" ")]
      2: (empty)
      3: (empty)
      4: L_CURLY@12..13 "{" [] []
      5: TS_TYPE_MEMBER_LIST@13..13
      6: R_CURLY@13..14 "}" [] []
    1: TS_INTERFACE_DECLARATION@14..40
      0: INTERFACE_KW@14..25 "interface" [Newline("\n")] [Whitespace(" ")]
      1: TS_IDENTIFIER_BINDING@25..27
        0: IDENT@25..27 "B" [] [Whitespace(" ")]
      2: (empty)
      3: TS_EXTENDS_CLAUSE@27..38
        0: EXTENDS_KW@27..35 "extends" [] [Whitespace(" ")]
        1: TS_TYPE_LIST@35..38
          0: TS_NAME_WITH_TYPE_ARGUMENTS@35..36
            0: JS_REFERENCE_IDENTIFIER@35..36
              0: IDENT@35..36 "A" [] []
            1: (empty)
          1: COMMA@36..38 "," [] [Whitespace(" ")]
          2: (empty)
      4: L_CURLY@38..39 "{" [] []
      5: TS_TYPE_MEMBER_LIST@39..39
      6: R_CURLY@39..40 "}" [] []
  4: EOF@40..41 "" [Newline("\n")] []
--
ts_extends_trailing_comma.ts:2:22 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × Trailing comma not allowed.
  
    1 │ interface A {}
  > 2 │ interface B extends A, {}
      │                      ^
    3 │ 
  
--
interface A {}
interface B extends A, {}