function isMixedWithParent(node) {
			return (
				node.operator !== node.parent.operator &&
				!astUtils.isParenthesised(sourceCode, node)
			);
		}
Checks whether the operator of a given node is mixed with parent
node's operator or not.
@param {ASTNode} node A node to check. This is a BinaryExpression
     node or a LogicalExpression node. This parent node is one of
     them, too.
@returns {boolean} `true` if the node was mixed.