Provide a copy of a boxed structure @src_boxed which is of type @boxed_type.
Free the boxed structure @boxed which is of type @boxed_type.
Creates a new %G_TYPE_POINTER derived type id for a new pointer type with name @name.
This function creates a new %G_TYPE_BOXED derived type id for a new boxed type with name @name. Boxed type handling functions have to be provided to copy and free opaque boxed structures of this type.