function isDoubleLogicalNegating(node) {
	return (
		node.operator === "!" &&
		node.argument.type === "UnaryExpression" &&
		node.argument.operator === "!"
	);
}
Checks whether or not a node is a double logical negating.
@param {ASTNode} node An UnaryExpression node to check.
@returns {boolean} Whether or not the node is a double logical negating.