Write a java method called "containsCycle" that receives the head of a singly linked list and returns true if the linked list contains a cycle and returns false otherwise. A linked list contains cycles if the next reference of any node refers to a preceding node. For example the linked list contains a cycle: Head Lo 02 03 04 05 08 07 06 1 B I ili U X2 x? re to search 1 a 18