src/Manager.php
public function getMigration()
    {
        return $this->migration ?:
            $this->migration = new Migration(clone $this->getFiles(), $this->console);
    }
public function getMigration()
    {
        return $this->migration ?:
            $this->migration = new Migration(clone $this->getFiles(), $this->console);
    }
Get migration.

@return Migration