def clean_items(items: ItemList):
"""Remove elements from an item list."""
items._items = []
def set_items(items: ItemList, value: List):
"""Remove elements from an item list."""
items._items = value
def strip_duplicate_items(items: ItemList):
"""Remove duplicates from an item list."""
new_items = {}
for item in items:
new_items[item.name] = item
items._items = list(new_items.values())
