protected function printErrorMessage(array $context = array())
    {
        if( $this->getOutput()->getVerbosity() >= OutputInterface::VERBOSITY_VERY_VERBOSE ) {
            $this->error( $this->getErrorMessage( $context ) );
        } else if( $this->getOutput()->getVerbosity() >= OutputInterface::VERBOSITY_VERBOSE ) {
            $this->output->write('<error>F</error>');
        }
    }