@Override
  public boolean isEquivalent(ReturnValue other) {
    if (!(other instanceof ConditionalReturnStatementValue)) return false;
    PsiExpression otherReturnValue = ((ConditionalReturnStatementValue) other).myReturnValue;
    if (otherReturnValue == null || myReturnValue == null) return myReturnValue == null && otherReturnValue == null;
    return PsiEquivalenceUtil.areElementsEquivalent(myReturnValue, otherReturnValue);
  }
@Override
  public boolean isEquivalent(ReturnValue other)