PhpParser\NodeVisitor\NameResolver::addAlias PHP Method

    protected function addAlias(Stmt\UseUse $use, $type, Name $prefix = null) {
        // Add prefix for group uses
        $name = $prefix ? Name::concat($prefix, $use->name) : $use->name;
        // Type is determined either by individual element or whole use declaration
        $type |= $use->type;

        // Constant names are case sensitive, everything else case insensitive
        if ($type === Stmt\Use_::TYPE_CONSTANT) {
            $aliasName = $use->alias;
        } else {
            $aliasName = strtolower($use->alias);
        }

        if (isset($this->aliases[$type][$aliasName])) {
            $typeStringMap = array(
                Stmt\Use_::TYPE_NORMAL   => '',
                Stmt\Use_::TYPE_FUNCTION => 'function ',
                Stmt\Use_::TYPE_CONSTANT => 'const ',
            );

            $this->errorHandler->handleError(new Error(
                sprintf(
                    'Cannot use %s%s as %s because the name is already in use',
                    $typeStringMap[$type], $name, $use->alias
                ),
                $use->getAttributes()
            ));
            return;
        }

        $this->aliases[$type][$aliasName] = $name;
    }

 protected function addAlias(Stmt\UseUse $use, $type, Name $prefix = null)
 {
     parent::addAlias($use, $type, $prefix);
     if ($type == Stmt\Use_::TYPE_NORMAL) {
         // Add prefix for group uses
         $name = strval($prefix ? Name::concat($prefix, $use->name) : $use->name);
         $this->classAliases[$use->alias] = $name;
     }
 }