function alwaysReturns(node){if(node.type==="BlockStatement"){// If we have a BlockStatement, check each consequent body node.
return node.body.some(checkForReturnOrIf);}/*
             * If not a block statement, make sure the consequent isn't a
             * ReturnStatement or an IfStatement with returns on both paths.
             */return checkForReturnOrIf(node);}
Check whether a node returns in every codepath.
@param {Node} node The node to be checked
@returns {boolean} `true` if it returns on every codepath.