Class DoubleKeyMap<Key1,Key2,Value>

java.lang.Object
org.antlr.v4.runtime.misc.DoubleKeyMap<Key1,Key2,Value>

public class DoubleKeyMap<Key1,Key2,Value> extends Object
Sometimes we need to map a key to a value but key is two pieces of data. This nested hash table saves creating a single key each time we access map; avoids mem creation.