Method __construct

/**
 * Constructor.
 *
 * Mandatory arguments:
 * subject		JTableInterface	The table we are operating on
 * pk			mixed			An optional primary key value to check out.
 *
 * @param   string  $name       The event name.
 * @param   array   $arguments  The event arguments.
 *
 * @throws  BadMethodCallException
 */
public function __construct($name, array $arguments = array())
{
    if (!\array_key_exists('pk', $arguments)) {
        throw new BadMethodCallException("Argument 'pk' is required for event {$name}");
    }
    parent::__construct($name, $arguments);
}