Group.InitChange -- prepare group for addition or removal of children
Synopsis
moai.DoMethod(id, "InitChange")
Function
Prepare a group for addition or removal of children. Whenever you call methods
like Group.Append, Group.Prepend, Group.Insert or
Group.Remove you first have to call this method to put the group into a
special exchange state which allows the addition and removal of children. When
you're finished, use Group.ExitChange to relayout the group.