This method of the IncludeExcludeWildcards Class retrieves the WildcardExpression object that specifies the strings that are included in the set.
public WildcardExpression getIncludeExpression();
Returns the WildcardExpression object that specifies the strings that are included in the set. If the IncludeExcludeWildcards object was created with a null include parameter and the include method has not been called, the method returns null.