Getters should not have parameters.

pkg/analysis_server/lib/src/generated_protocol.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 //
 // This file has been automatically generated.  Please do not edit it manually.
 // To regenerate the file, use the script
 // "pkg/analysis_server/tool/spec/generate_files".
 
 part of protocol;
 /**
@@ skipping 6042 matching lines @@
    * - 0x04 - set if the element was declared to be ‘final’
    * - 0x08 - set if the element is a static member of a class or is a
    *   top-level function or field
    * - 0x10 - set if the element is private
    * - 0x20 - set if the element is deprecated
    */
   int flags;
 
   /**
    * The parameter list for the element. If the element is not a method or
-   * function this field will not be defined. If the element has zero
-   * parameters, this field will have a value of "()".
+   * function this field will not be defined. If the element doesn't have
+   * parameters (e.g. getter), this field will not be defined. If the element
+   * has zero parameters, this field will have a value of "()".
    */
   String parameters;
 
   /**
    * The return type of the element. If the element is not a method or function
    * this field will not be defined. If the element does not have a declared
    * return type, this field will contain an empty string.
    */
   String returnType;
 
@@ skipping 4644 matching lines @@
     return false;
   }
 
   @override
   int get hashCode {
     int hash = 0;
     hash = _JenkinsSmiHash.combine(hash, newName.hashCode);
     return _JenkinsSmiHash.finish(hash);
   }
 }