Obtains a reference to the value mapped by key. A value for key is
expected to exist in the map.
Note: Use this method if it is sure that a value for key is in the map,
in other words, it would be a bug if it isn't. To look up a mapping that
may or may not exist, use the 'in' operator (opBinaryRight!"in"above).
Obtains a reference to the value mapped by key. A value for key is expected to exist in the map.
Note: Use this method if it is sure that a value for key is in the map, in other words, it would be a bug if it isn't. To look up a mapping that may or may not exist, use the 'in' operator (opBinaryRight!"in"above).