lookup_value

Looks up a value in a VariantDict.

If key is not found in dictionary, null is returned.

The expected_type string specifies what type of value is expected. If the value associated with key has a different type then null is returned.

If the key is found and the value has the correct type, it is returned. If expected_type was specified then any non- null return value will have this type.

Parameters:

this	a VariantDict
key	the key to lookup in the dictionary
expected_type	a VariantType, or null

Returns:

the value of the dictionary key, or null