src/Model.php
public function insertExists(array $bindings, $value, $ttl = null)
    {
        return $this->insert($bindings, $value, $ttl, true);
    }
public function insertExists(array $bindings, $value, $ttl = null)
    {
        return $this->insert($bindings, $value, $ttl, true);
    }
public function insertExists ( array $ bindings , $ value , $ ttl = null ) { return $ this -> insert ( $ bindings , $ value , $ ttl , true ) ; }
Insert when key exists

@param array $bindings
@param $value
@param null $ttl
@return mixed
Insert when key exists