@Nullable
  @Override
  public PsiElement adjustTargetElement(Editor editor, int offset, int flags, @NotNull PsiElement targetElement) {
    if (targetElement instanceof GrPropertyForCompletion) {
      return ((GrPropertyForCompletion)targetElement).getOriginalAccessor();
    }
    return super.adjustTargetElement(editor, offset, flags, targetElement);
  }
@Nullable
  @Override
  public PsiElement adjustTargetElement(Editor editor, int offset, int flags, @NotNull PsiElement targetElement)