default implementation for isAnnotationValid()

platform/vcs-api/src/com/intellij/openapi/vcs/annotate/AnnotationProvider.java

@@ -34,5 +34,5 @@ public interface AnnotationProvider extends VcsProviderMarker {
    * @param rev File revision to be checked.
    * @return true if annotation it valid for the given revision.
    */
-  boolean isAnnotationValid(@NotNull VcsFileRevision rev);
+  default boolean isAnnotationValid(@NotNull VcsFileRevision rev) { return true; }
 }

platform/vcs-api/src/com/intellij/openapi/vcs/history/VcsAnnotationCachedProxy.java

@@ -146,7 +146,7 @@ public class VcsAnnotationCachedProxy implements AnnotationProvider {
   }
 
   @Override
-  public boolean isAnnotationValid(VcsFileRevision rev) {
+  public boolean isAnnotationValid(@NotNull VcsFileRevision rev) {
     return myAnnotationProvider.isAnnotationValid(rev);
   }
 

plugins/cvs/cvs-plugin/src/com/intellij/cvsSupport2/annotate/CvsAnnotationProvider.java

@@ -83,10 +83,6 @@ public class CvsAnnotationProvider implements AnnotationProvider{
     return annotate(file, revision.getRevisionNumber().asString(), settings);
   }
 
-  public boolean isAnnotationValid(VcsFileRevision rev){
-    return true;
-  }
-
   public FileAnnotation annotate(VirtualFile cvsVirtualFile, String revision, CvsEnvironment environment) throws VcsException {
     // the VirtualFile has a full path if annotate is called from history (when we have a real file on disk),
     // and has the path equal to a CVS module name if annotate is called from the CVS repository browser

plugins/git4idea/src/git4idea/annotate/GitAnnotationProvider.java

@@ -249,8 +249,4 @@ public class GitAnnotationProvider implements AnnotationProviderEx, VcsCacheable
     }
     return new GitFileAnnotation(myProject, virtualFile, revisionNumber, lines);
   }
-
-  public boolean isAnnotationValid(VcsFileRevision rev) {
-    return true;
-  }
 }

plugins/hg4idea/src/org/zmlx/hg4idea/provider/annotate/HgAnnotationProvider.java

@@ -80,8 +80,4 @@ public class HgAnnotationProvider implements AnnotationProviderEx {
       .getHistory(hgFile.toFilePath(), vcsRoot, myProject, (HgRevisionNumber)revision, -1);
     return new HgAnnotation(myProject, hgFile, annotationResult, logResult, revision);
   }
-
-  public boolean isAnnotationValid(@NotNull VcsFileRevision rev) {
-    return true;
-  }
 }

plugins/svn4idea/src/org/jetbrains/idea/svn/annotate/SvnAnnotationProvider.java

@@ -451,10 +451,6 @@ public class SvnAnnotationProvider implements AnnotationProvider, VcsCacheableAn
     }
   }
 
-  public boolean isAnnotationValid( VcsFileRevision rev ){
-    return true;
-  }
-
   @Nullable
   private static DiffOptions getLogClientOptions(@NotNull SvnVcs vcs) {
     return SvnConfiguration.getInstance(vcs.getProject()).isIgnoreSpacesInAnnotate() ? new DiffOptions(true, true, true) : null;