code: function isIdentifier(name, languageVersion) {
          if (!isIdentifierStart(name.charCodeAt(0), languageVersion)) {
              return false;
          }
          for (var i = 1, n = name.length; i < n; i++) {
              if (!isIdentifierPart(name.charCodeAt(i), languageVersion)) {
                  return false;
              }
          }
          return true;
      }
docs: /* @internal