Returns a value > 0 if this list contains all of the elements in the specified collection.
Returns a value > 0 if this list contains all of the elements in the specified collection.This implementation iterates over the specified collection, checking each element returned by the iterator in turn to see if it's contained in this list. If all elements are so contained a value > 0 is returned, otherwise 0.
This method has a time complexity of O(N * M), with N being the size of the list and M being the size of the collection.