Analysis request `getReachableSources` (#24893).

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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    * analysis (e.g. because it is not associated with any analysis root specified to
    * analysis.setAnalysisRoots), an error of type GET_NAVIGATION_INVALID_FILE will be generated.
    *
    * @param file The file in which navigation information is being requested.
    * @param offset The offset of the region for which navigation information is being requested.
    * @param length The length of the region for which navigation information is being requested.
    */
   public void analysis_getNavigation(String file, int offset, int length, GetNavigationConsumer consumer);
 
   /**
+   * {@code analysis.getReachableSources}
+   *
+   * Return the transitive closure of reachable sources for a given file.
+   *
+   * If a request is made for a file which does not exist, or which is not currently subject to
+   * analysis (e.g. because it is not associated with any analysis root specified to
+   * analysis.setAnalysisRoots), an error of type GET_REACHABLE_SOURCES_INVALID_FILE will be
+   * generated.
+   *
+   * @param file The file for which reachable source information is being requested.
+   */
+  public void analysis_getReachableSources(String file, GetReachableSourcesConsumer consumer);
+
+  /**
    * {@code analysis.reanalyze}
    *
    * Force the re-analysis of everything contained in the specified analysis roots. This will cause
    * all previously computed analysis results to be discarded and recomputed, and will cause all
    * subscribed notifications to be re-sent.
    *
    * If no analysis roots are provided, then all current analysis roots will be re-analyzed. If an
    * empty list of analysis roots is provided, then nothing will be re-analyzed. If the list contains
    * one or more paths that are not currently analysis roots, then an error of type
    * INVALID_ANALYSIS_ROOT will be generated.
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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;
 
 }