public static @Nullable PsiElement findSiblingBackward(@NotNull PsiElement element,
                                                         @NotNull IElementType elementType,
                                                         @Nullable Consumer<? super PsiElement> consumer) {
    return findSiblingBackward(element, elementType, true, consumer);
  }
public static @Nullable PsiElement findSiblingBackward(@NotNull PsiElement element,
                                                         @NotNull IElementType elementType,
                                                         @Nullable Consumer<? super PsiElement> consumer)