private extern static int ovr_freepie_read(out OculusVr3Dof output);
private static extern int ovr_freepie_read(out OculusVr3Dof output);
private extern static int ovr_freepie_read(out OculusVr3Dof output);
private static extern int ovr_freepie_read(out OculusVr3Dof output);