Spanner/src/Instance.php
public function iam()
    {
        if (!$this->iam) {
            $this->iam = new Iam(
                new IamInstance($this->connection),
                $this->name
            );
        }

        return $this->iam;
    }
public function iam()
    {
        if (!$this->iam) {
            $this->iam = new Iam(
                new IamInstance($this->connection),
                $this->name
            );
        }

        return $this->iam;
    }
public function iam ( ) { if ( ! $ this -> iam ) { $ this -> iam = new Iam ( new IamInstance ( $ this -> connection ) , $ this -> name ) ; } return $ this -> iam ; }
Manage the instance IAM policy

Example:
```
$iam = $instance->iam();
```

@return Iam
Manage the instance IAM policy