defaultValueList property
The default values for a slot. You can specify more than one default. For example, you can specify a default value to use from a matching context variable, a session attribute, or a fixed value.
The default value chosen is selected based on the order that you specify them in the list. For example, if you specify a context variable and a fixed value in that order, Amazon Lex uses the context variable if it is available, else it uses the fixed value.
Implementation
final List<SlotDefaultValue> defaultValueList;