/* Modify and return the given map as follows: if the key "a" has a value, set the key "b" to have that same value. In all cases remove the key "c", leaving the rest of the map unchanged. mapShare({"a": "aaa", "b": "bbb", "c": "ccc"}) → {"a": "aaa", "b": "aaa"} mapShare({"b": "xyz", "c": "ccc"}) → {"b": "xyz"} mapShare({"a": "aaa", "c": "meh", "d": "hi"}) → {"a": "aaa", "b": "aaa", "d": "hi"} */ public class MapShare { }