a pointer to the newly-allocated copy of the memory
Deprecated: Use funcGLib.memdup2 instead, as it accepts a gsize argument for byte_size, avoiding the possibility of overflow in a gobject.types.size_t → pango.types.ATTR_INDEX_TO_TEXT_END conversion
Allocates byte_size bytes of memory, and copies byte_size bytes into it from mem. If mem is NULL it returns NULL.