Add getStatementCompletion to the API spec

pkg/analysis_server/tool/spec/generated/java/AnalysisServer.java

 /*
  * Copyright (c) 2015, the Dart project authors.
  *
  * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
  * in compliance with the License. You may obtain a copy of the License at
  *
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Unless required by applicable law or agreed to in writing, software distributed under the License
  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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    *         validated and no change be generated.
    * @param options Data used to provide values provided by the user. The structure of the data is
    *         dependent on the kind of refactoring being performed. The data that is expected is
    *         documented in the section titled Refactorings, labeled as "Options". This field can be
    *         omitted if the refactoring does not require any options or if the values of those
    *         options are not known.
    */
   public void edit_getRefactoring(String kind, String file, int offset, int length, boolean validateOnly, RefactoringOptions options, GetRefactoringConsumer consumer);
 
   /**
+   * {@code edit.getStatementCompletion}
+   *
+   * Get the changes required to convert the partial statement at the given location into a
+   * syntactically valid statement. If the current statement is already valid the change will insert
+   * a newline plus appropriate indentation at the end of the line containing the offset. If a change
+   * that makes the statement valid cannot be determined (perhaps because it has not yet been
+   * implemented) the statement will be considered already valid and the appropriate change returned.
+   *
+   * @param file The file containing the statement to be completed.
+   * @param offset The offset used to identify the statement to be completed.
+   */
+  public void edit_getStatementCompletion(String file, int offset, GetStatementCompletionConsumer consumer);
+
+  /**
    * {@code edit.organizeDirectives}
    *
    * Organizes all of the directives - removes unused imports and sorts directives of the given Dart
    * file according to the Dart Style Guide.
    *
    * If a request is made for a file that does not exist, does not belong to an analysis root or is
    * not a Dart file, FILE_NOT_ANALYZED will be generated.
    *
    * If directives of the Dart file cannot be organized, for example because it has scan or parse
    * errors, or by other reasons, ORGANIZE_DIRECTIVES_ERROR will be generated. The message will
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    * the response to this request has been sent.
    */
   public void server_shutdown();
 
   /**
    * Start the analysis server.
    */
   public void start() throws Exception;
 
 }