public function offsetGet($offset)
    {
        if (!array_key_exists($offset, $this->_values)) {
            throw new ClientException('Invalid option ' . $offset);
        }

        return $this->_values[$offset];
    }
public function offsetGet($offset)
    {
        if (!array_key_exists($offset, $this->_values)) {
            throw new ClientException('Invalid option ' . $offset);
        }

        return $this->_values[$offset];
    }
public function offsetGet ( $ offset ) { if ( ! array_key_exists ( $ offset , $ this -> _values ) ) { throw new ClientException ( 'Invalid option ' . $ offset ) ; } return $ this -> _values [ $ offset ] ; }
Get a specific option, necessary for ArrayAccess

@throws ClientException

@param string $offset - name of option

@return mixed - value of option, will throw if option is not set
Get a specific option necessary for ArrayAccess