def __init__(self, tree_transform_controller=None, start_packages=None):
assert isinstance(tree_transform_controller, TreeTransformController)
self.code_presenter = None
self.tree_transform_controller = tree_transform_controller
self.transform_pane = TransformPane(transform_presenter=self)
self.transform_collections = []
self.transforms_loaded = []
self.transforms_by_name = {}
