Type Definition glu_sys::glu::PFNGLNORMAL3FVERTEX3FSUNPROC

type PFNGLNORMAL3FVERTEX3FSUNPROC = Option<unsafe extern "C" fn(nx: GLfloat, ny: GLfloat, nz: GLfloat, x: GLfloat, y: GLfloat, z: GLfloat)>;