code: func DebugMessageInsert(source uint32, xtype uint32, id uint32, severity uint32, length int32, buf *uint8) {
  	C.glowDebugMessageInsert(gpDebugMessageInsert, (C.GLenum)(source), (C.GLenum)(xtype), (C.GLuint)(id), (C.GLenum)(severity), (C.GLsizei)(length), (*C.GLchar)(unsafe.Pointer(buf)))
  }
docs: // inject an application-supplied message into the debug message queue