A pathname inside the resource
a location to place the length of the contents of the file, or NULL if the length is not needed
a location to place the GResourceFlags about the file, or NULL if the flags are not needed
TRUE if the file was found. FALSE if there were errors
GException on failure.
2.32
Looks for a file at the specified path in the set of globally registered resources and if found returns information about it.
lookup_flags controls the behaviour of the lookup.