code: protected function get_levels() {
  		return array(
  			LogLevel::EMERGENCY => 'Emergency',
  			LogLevel::ALERT     => 'Alert',
  			LogLevel::CRITICAL  => 'Critical',
  			LogLevel::ERROR     => 'Error',
  			LogLevel::WARNING   => 'Warning',
  			LogLevel::NOTICE    => 'Notice',
  			LogLevel::INFO      => 'Info',
  			LogLevel::DEBUG     => 'Debug'
  		);
  	}
docs: Get all the possible levels.
  
  @since 1.0
  
  @return array