@Override
 protected void initializeFrom(OperationLexer operationLexer) {
   projectName = operationLexer.readString();
   int referencingProjectsCount = operationLexer.readInt();
   for (int i = 0; i < referencingProjectsCount; i++) {
     referencingProjectNames.add(operationLexer.readString());
   }
 }
 @Override
 protected void initializeFrom(OperationLexer operationLexer) {
   sourceName = operationLexer.readString();
   selections = operationLexer.readStrings();
 }