--[=[ Quickbar Notruf 2023-02-12 ]=]  local items    = require( 'Module:GetItem' )   -- returns nil, if both values are equal, otherwise the value -- similar to the SQL function nullif() local function nilIf ( value, equalValue )     if ( value == nil ) then       return nil    elseif ( tostring ( value ) == tostring ( equalValue ) ) then       return nil    else       return value    end  end   local qbNotruf = {}  function qbNotruf.qb_notruf ( frame )       -- copying and lowering the given parameters    local templateArgs = {}    for key,value in pairs ( frame.args ) do       templateArgs[string.lower(key)] = value    end    for key,value in pairs ( frame:getParent().args ) do       templateArgs[string.lower(key)] = value    end     -- variables for the whole quickbar content and the categories    local display = ''    local categories = ''        -- contains some site.infos    -- needed as fallback for the  parameter "Namen" and the location map    local page = {}    page = mw.title.getCurrentTitle()        -- getting or determining (if needed) the wikidata-ID    if templateArgs.id == '' then templateArgs.id = nil end    local qbID = nilIf ( nilIf ( templateArgs.id, 'self' ), '' ) or mw.wikibase.getEntityIdForCurrentPage() or ''     -- determining the country     -- (not urgently needed, but if someone wants to develop country- specific quickbars)    -- getting from Wikidata, if not provided    -- if you want to save processing time, you should provide it    -- e.g. in country specific infobox tables    local qbIso3166 = templateArgs["iso-3166"] or ''    local qbIso3166Class = ''     if qbIso3166 == '' then       if qbID ~= '' then          local wdCountry = mw.wikibase.getBestStatements( qbID, 'P17' )          local wdIso3166 = {}          if #wdCountry > 0 then             -- there where empty values             if wdCountry[1].mainsnak.datavalue ~= nil then                wdIso3166 = mw.wikibase.getBestStatements( wdCountry[1].mainsnak.datavalue.value["id"], 'P297' )                if #wdIso3166 > 0 then                   qbIso3166 = string.lower(wdIso3166[1].mainsnak.datavalue.value)                   qbIso3166Class =  ' voy-qb-' .. qbIso3166                else                   qbIso3166Class = ''                end             else                 qbIso3166Class = ''             end          end       end    else       qbIso3166Class = ' voy-qb-' .. qbIso3166    end      -- starting the quickbar table    display = display .. '<div class="voy-qb-rightdiv"><table cellspacing="0" class="voy-qb voy-qb-emergency-calls' .. qbIso3166Class .. '">'        -- creating the row with the heading    local trHeader = mw.html.create ( 'tr' )    trHeader:addClass( 'voy-qb-header' )    trHeader:tag('td')       :attr('colspan', 2 )       :wikitext('Notrufnummern')     -- adding it to the quickbar    display = display .. tostring ( trHeader )      -- official language    display = display .. mw.ustring.gsub ( items.GetItem().getItemsQuickbar ( qbID, 'P2852' ), 'Notruf ', '' )     -- finishing the HTML table    display = display .. '</table></div>'     return display .. categories     end  return qbNotruf