Function NSOpenGLGetVersion 

pub unsafe extern "C-unwind" fn NSOpenGLGetVersion(
    major: *mut i32,
    minor: *mut i32,
)

👎Deprecated: OpenGL API deprecated; please use Metal and MetalKit. (Define GL_SILENCE_DEPRECATION to silence these warnings.)

Available on crate feature NSOpenGL and crate feature objc2-open-gl and Apple only.

Safety

• major must be a valid pointer or null.
• minor must be a valid pointer or null.