Function glTextureImage2DMultisampleNV 

pub unsafe extern "C" fn glTextureImage2DMultisampleNV(
    texture: GLuint,
    target: GLenum,
    samples: GLsizei,
    internalFormat: GLint,
    width: GLsizei,
    height: GLsizei,
    fixedSampleLocations: GLboolean,
)