/**
* Checks to see if a foreign key exists.
*
* @param string $tableName
* @param string[] $columns Column(s)
* @param string|null $constraint Constraint name
* @return bool
*/
public function hasForeignKey($tableName, $columns, $constraint = null)
{
return $this->adapter->hasForeignKey($tableName, $columns, $constraint);
}
