@Nullable
  public static PyCallExpression findCallExpParent(@NotNull final PsiElement anchor, @NotNull final FQNamesProvider functionName) {
    final PsiElement parent = PsiTreeUtil.findFirstParent(anchor, new MyFunctionCondition(functionName));
    if (parent instanceof PyCallExpression) {
      return (PyCallExpression)parent;
    }
    return null;
  }
@Nullable
  public static PyCallExpression findCallExpParent(@NotNull final PsiElement anchor, @NotNull final FQNamesProvider functionName)