pub type PFNGLDELETENAMESAMDPROC = Option<unsafe extern "C" fn(identifier: GLenum, num: GLuint, names: *const GLuint)>;
enum PFNGLDELETENAMESAMDPROC { None, Some(unsafe extern "C" fn(_: u32, _: u32, _: *const u32)), }
No value.
Some value of type T.
T