code: func (conf FilterConfigurator) getChain() []Filter {
  	var filters []Filter
  	if filters = getOverrideChain(conf.controllerName, conf.key); filters == nil {
  		// The override starts with all filters after FilterConfiguringFilter
  		for i, f := range Filters {
  			if FilterEq(f, FilterConfiguringFilter) {
  				filters = make([]Filter, len(Filters)-i-1)
  				copy(filters, Filters[i+1:])
  				break
  			}
  		}
  		if filters == nil {
  			panic("FilterConfiguringFilter not found in revel.Filters.")
  		}
  	}
  	return filters
  }
docs: // getChain returns the filter chain that applies to the given controller or
  // action.  If no overrides are configured, then a copy of the default filter
  // chain is returned.