docs: function parseArguments() {
          var args = [];
  
          expect('(');
  
          if (!match(')')) {
              while (startIndex < length) {
                  args.push(parseAssignmentExpression());
                  if (match(')')) {
                      break;
                  }
                  expectCommaSeparator();
              }
          }
  
          expect(')');
  
          return args;
      }