public function getRequiredOptions()
    {
        if (! $this->required) {
            return null;
        }

        if ($this->required instanceof ConfigInterface) {
            return $this->required->getArrayCopy();
        }

        return (array)$this->required;
    }
public function getRequiredOptions()
    {
        if (! $this->required) {
            return null;
        }

        if ($this->required instanceof ConfigInterface) {
            return $this->required->getArrayCopy();
        }

        return (array)$this->required;
    }
public function getRequiredOptions ( ) { if ( ! $ this -> required ) { return null ; } if ( $ this -> required instanceof ConfigInterface ) { return $ this -> required -> getArrayCopy ( ) ; } return ( array ) $ this -> required ; }
Get the set of required options.

@since 0.1.0

@return array|null
Get the set of required options .