private static void textLiteral( Consumer<? super LiteralNode> add, String literal )
    {
        add.accept( literal( literal, false ) );
    }
private static void textLiteral ( Consumer < ? super LiteralNode > add , String literal ) { add . accept ( literal ( literal , false ) ) ; }
Creates a text literal, a case insensitive literal.

@param add     the adder that adds the literal node to its parent node.
@param literal the literal string.