pub unsafe extern "C" fn gdk_content_formats_union(
first: *mut GdkContentFormats,
second: *const GdkContentFormats,
) -> *mut GdkContentFormats
pub unsafe extern "C" fn gdk_content_formats_union(
first: *mut GdkContentFormats,
second: *const GdkContentFormats,
) -> *mut GdkContentFormats