$this setRelations(array $relations) Set the entire relations array on

Collection union(mixed $items)

array all() Get all of the items in the collection.

array getTouchedRelations() Get the relationships that are touched on save

CachingIterator getCachingIterator(int $flags = CachingIterator::CALL_TOSTRING)

static void clearBootedModels() Clear the list of booted models

mixed get(mixed $key, mixed $default = null) Get an item from the collection

Collection mapWithKeys(callable $callback)

$this put(mixed $key, mixed $value) Put an item in the collection by key

Collection keys()