Function GLKMatrix3Invert 

pub unsafe extern "C-unwind" fn GLKMatrix3Invert(
    matrix: GLKMatrix3,
    is_invertible: *mut bool,
) -> GLKMatrix3

👎Deprecated: The OpenGL API is deprecated by Apple

Available on crate features GLKMathTypes and GLKMatrix3 only.

Safety

is_invertible must be a valid pointer.