Checks if file has a parent, and optionally, if it is parent.
If parent is null then this function returns true if file has any parent at all. If parent is non-null then true is only returned if file is an immediate child of parent.
the parent to check for, or null
true if file is an immediate child of parent (or any parent in the case that parent is null).
Checks if file has a parent, and optionally, if it is parent.
If parent is null then this function returns true if file has any parent at all. If parent is non-null then true is only returned if file is an immediate child of parent.