FMOD.SoundGroup.FMOD_SoundGroup_GetMuteFadeSpeed C# (CSharp) Method

        private static extern RESULT FMOD_SoundGroup_GetMuteFadeSpeed   (IntPtr soundgroup, out float speed);
        [DllImport(VERSION.dll)]

 public RESULT getMuteFadeSpeed(ref float speed)
 {
     return(SoundGroup.FMOD_SoundGroup_GetMuteFadeSpeed(soundgroupraw, ref speed));
 }