getMasterVolume method
Implementation
int getMasterVolume(Pointer<Float> pfLevel) => (ptr.ref.vtable + 4)
.cast<
Pointer<
NativeFunction<
Int32 Function(Pointer, Pointer<Float> pfLevel)>>>()
.value
.asFunction<int Function(Pointer, Pointer<Float> pfLevel)>()(
ptr.ref.lpVtbl, pfLevel);