src/main/php/Rootpath.php
public function sourcePathes()
    {
        $vendorPathes = [];
        foreach (array_merge($this->loadPsr0Pathes(), $this->loadPsr4Pathes()) as $pathes) {
            if (is_array($pathes)) {
                $vendorPathes = array_merge($vendorPathes, $pathes);
            } else {
                $vendorPathes[] = $pathes;
            }
        }

        return $vendorPathes;
    }
public function sourcePathes()
    {
        $vendorPathes = [];
        foreach (array_merge($this->loadPsr0Pathes(), $this->loadPsr4Pathes()) as $pathes) {
            if (is_array($pathes)) {
                $vendorPathes = array_merge($vendorPathes, $pathes);
            } else {
                $vendorPathes[] = $pathes;
            }
        }

        return $vendorPathes;
    }
returns list of source pathes defined for autoloader

Relies on autoloader generated by Composer. If no such autoloader is
present the list of source pathes will be empty.

@return  string[]