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yields True if e1 contains all of the elements of e2.
is an operator form that yields True when the object to which it is applied contains all of the elements of e2.
The first list contains all elements of the second list:
The first list does not contain all elements of the second list:
SubsetQ ContainsNone ContainsAny ContainsExactly ContainsOnly MemberQ FreeQ Intersection Complement