JsModule {
    bom_token: missing (optional),
    interpreter_token: missing (optional),
    directives: JsDirectiveList [],
    items: JsModuleItemList [
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                await_token: missing (optional),
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                declarators: JsVariableDeclaratorList [
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                                    directives: JsDirectiveList [],
                                    statements: JsStatementList [],
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            semicolon_token: SEMICOLON@27..28 ";" [] [],
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                await_token: missing (optional),
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            semicolon_token: SEMICOLON@60..61 ";" [] [],
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0: JS_MODULE@0..62
  0: (empty)
  1: (empty)
  2: JS_DIRECTIVE_LIST@0..0
  3: JS_MODULE_ITEM_LIST@0..61
    0: JS_VARIABLE_STATEMENT@0..28
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        2: JS_VARIABLE_DECLARATOR_LIST@4..27
          0: JS_VARIABLE_DECLARATOR@4..27
            0: JS_IDENTIFIER_BINDING@4..6
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            1: (empty)
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                2: (empty)
                3: (empty)
                4: (empty)
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                  1: JS_PARAMETER_LIST@23..23
                  2: R_PAREN@23..25 ")" [] [Whitespace(" ")]
                6: (empty)
                7: JS_FUNCTION_BODY@25..27
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                  1: JS_DIRECTIVE_LIST@26..26
                  2: JS_STATEMENT_LIST@26..26
                  3: R_CURLY@26..27 "}" [] []
      1: SEMICOLON@27..28 ";" [] []
    1: JS_VARIABLE_STATEMENT@28..61
      0: JS_VARIABLE_DECLARATION@28..60
        0: (empty)
        1: LET_KW@28..33 "let" [Newline("\n")] [Whitespace(" ")]
        2: JS_VARIABLE_DECLARATOR_LIST@33..60
          0: JS_VARIABLE_DECLARATOR@33..60
            0: JS_IDENTIFIER_BINDING@33..35
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            1: (empty)
            2: JS_INITIALIZER_CLAUSE@35..60
              0: EQ@35..37 "=" [] [Whitespace(" ")]
              1: JS_FUNCTION_EXPRESSION@37..60
                0: ASYNC_KW@37..43 "async" [] [Whitespace(" ")]
                1: FUNCTION_KW@43..52 "function" [] [Whitespace(" ")]
                2: (empty)
                3: JS_IDENTIFIER_BINDING@52..55
                  0: IDENT@52..55 "foo" [] []
                4: (empty)
                5: JS_PARAMETERS@55..58
                  0: L_PAREN@55..56 "(" [] []
                  1: JS_PARAMETER_LIST@56..56
                  2: R_PAREN@56..58 ")" [] [Whitespace(" ")]
                6: (empty)
                7: JS_FUNCTION_BODY@58..60
                  0: L_CURLY@58..59 "{" [] []
                  1: JS_DIRECTIVE_LIST@59..59
                  2: JS_STATEMENT_LIST@59..59
                  3: R_CURLY@59..60 "}" [] []
      1: SEMICOLON@60..61 ";" [] []
  4: EOF@61..62 "" [Newline("\n")] []