private void AddToSelectable(Component parentSelectableComponent)
{
_selectable.transform.SetParent(parentSelectableComponent.transform, true);
object thisSelectable = _selectable.GetComponent(SelectableType);
object parentSelectable = parentSelectableComponent.GetComponent(SelectableType);
ParentField.SetValue(thisSelectable, parentSelectable);
Array parentChildren = (Array)ChildrenField.GetValue(parentSelectable);
Array newParentChildren = Array.CreateInstance(SelectableType, parentChildren.Length + 1);
Array.Copy(parentChildren, newParentChildren, holdableChildIndex);
newParentChildren.SetValue(thisSelectable, holdableChildIndex);
Array.Copy(parentChildren, holdableChildIndex, newParentChildren, holdableChildIndex + 1, parentChildren.Length - holdableChildIndex);
ChildrenField.SetValue(parentSelectable, newParentChildren);
ChildRowLengthField.SetValue(parentSelectable, ((int)ChildRowLengthField.GetValue(parentSelectable)) + 1);
InitMethod.Invoke(parentSelectable, null);
InputHelper.InvokeConfigureSelectableAreas(parentSelectableComponent);
}