code: function isReturnAssignException(node) {
  			if (!EXCEPT_RETURN_ASSIGN || !isInReturnStatement(node)) {
  				return false;
  			}
  
  			if (node.type === "ReturnStatement") {
  				return node.argument && containsAssignment(node.argument);
  			} else if (node.type === "ArrowFunctionExpression" && node.body.type !== "BlockStatement") {
  				return containsAssignment(node.body);
  			}
  			return containsAssignment(node);
  		}
docs: Determines if a node is contained by or is itself a return statement and is allowed to have a parenthesised assignment
  @param {ASTNode} node - The node to be checked.
  @returns {boolean} True if the assignment can be parenthesised.
  @private