function hasDoubleExcessParens(node) {
			return ruleApplies(node) && isParenthesisedTwice(node);
		}
Determines if a node that is expected to be parenthesised is surrounded by
(potentially) invalid extra parentheses.
@param {ASTNode} node The node to be checked.
@returns {boolean} True if the node is has an unexpected extra pair of parentheses.
@private