private void OnEnable()
{
inputCollector = target as BaseInputCollector;
list = new ReorderableList(
serializedObject,
serializedObject.FindProperty("inputSources"),
true, true, true, true);
list.drawHeaderCallback = DrawHeader;
list.drawElementCallback = DrawListElement;
list.onAddCallback = AddElement;
list.onRemoveCallback = RemoveElement;
_inputSourcesTypes = InputCollectorManager.GetDerivedTypes <BaseInputSource>();
_inputSourcesMenu = GenerateMenuFormTypes(_inputSourcesTypes, AddNewSource);
}