public EqualFunc<void*> direct_equal
Compares two pointer arguments and returns true if they are equal.
It can be passed to
g_hash_table_new as the
key_equal_func parameter, when using opaque pointers compared by pointer
value as keys in a GenericSet.
This equality function is also appropriate for keys that are integers stored in pointers, such as `GINT_TO_POINTER (n)`.
a key to compare with
true if the two keys match.