code: public function get_columns() {
  
  		return array(
  			'message' => $this->translations['message'],
  			'level'   => $this->translations['level'],
  			'time'    => $this->translations['time'],
  			'ip'      => $this->translations['ip'],
  			'user'    => $this->translations['user'],
  			'group'   => $this->translations['group'],
  		);
  	}
docs: Get a list of columns. The format is:
  'internal-name' => 'Title'
  
  @since  1.0
  @access public
  
  @return array