JsModule {
    bom_token: UNICODE_BOM@0..3 "\u{feff}" [] [],
    interpreter_token: missing (optional),
    directives: JsDirectiveList [],
    items: JsModuleItemList [
        JsFunctionDeclaration {
            async_token: missing (optional),
            function_token: FUNCTION_KW@3..12 "function" [] [Whitespace(" ")],
            star_token: missing (optional),
            id: JsIdentifierBinding {
                name_token: IDENT@12..16 "foo" [] [Whitespace(" ")],
            },
            type_parameters: missing (optional),
            parameters: JsParameters {
                l_paren_token: L_PAREN@16..18 "(" [] [Whitespace(" ")],
                items: JsParameterList [],
                r_paren_token: R_PAREN@18..20 ")" [] [Whitespace(" ")],
            },
            return_type_annotation: missing (optional),
            body: JsFunctionBody {
                l_curly_token: L_CURLY@20..21 "{" [] [],
                directives: JsDirectiveList [],
                statements: JsStatementList [],
                r_curly_token: R_CURLY@21..22 "}" [] [],
            },
        },
    ],
    eof_token: EOF@22..22 "" [] [],
}

0: JS_MODULE@0..22
  0: UNICODE_BOM@0..3 "\u{feff}" [] []
  1: (empty)
  2: JS_DIRECTIVE_LIST@3..3
  3: JS_MODULE_ITEM_LIST@3..22
    0: JS_FUNCTION_DECLARATION@3..22
      0: (empty)
      1: FUNCTION_KW@3..12 "function" [] [Whitespace(" ")]
      2: (empty)
      3: JS_IDENTIFIER_BINDING@12..16
        0: IDENT@12..16 "foo" [] [Whitespace(" ")]
      4: (empty)
      5: JS_PARAMETERS@16..20
        0: L_PAREN@16..18 "(" [] [Whitespace(" ")]
        1: JS_PARAMETER_LIST@18..18
        2: R_PAREN@18..20 ")" [] [Whitespace(" ")]
      6: (empty)
      7: JS_FUNCTION_BODY@20..22
        0: L_CURLY@20..21 "{" [] []
        1: JS_DIRECTIVE_LIST@21..21
        2: JS_STATEMENT_LIST@21..21
        3: R_CURLY@21..22 "}" [] []
  4: EOF@22..22 "" [] []