Function copySymbol

test/fixtures/snapshot/typescript.js:86129–86139

* Copy the given symbol into symbol tables if the symbol has the given meaning * and it doesn't already existed in the symbol table * @param key a key for storing in symbol table; if undefined, use symbol.name * @param symbol the symbol to be added into symbol

(symbol, meaning)

             * @param meaning meaning of symbol to filter by before adding to symbol table
             */
            function copySymbol(symbol, meaning) {
                if (ts.getCombinedLocalAndExportSymbolFlags(symbol) & meaning) {
                    var id = symbol.escapedName;
                    // We will copy all symbol regardless of its reserved name because
                    // symbolsToArray will check whether the key is a reserved name and
                    // it will not copy symbol with reserved name to the array
                    if (!symbols.has(id)) {
                        symbols.set(id, symbol);
                    }
                }
            }
            function copySymbols(source, meaning) {
                if (meaning) {
                    source.forEach(function (symbol) {