vlocity - Typeahead block construction example

/*
 author: Balayesu
 description:   This class sets select element values dynamically in Dental questions omniscript
*/
global with sharing class DentalQuestionsOmniscriptController implements vlocity_ins.VlocityOpenInterface {
    public String groupId;
    public Boolean invokeMethod(String methodName, Map<String, Object> input, Map<String, Object> outMap, Map<String, Object> options){
        boolean flag=false;
        System.debug('Setting inputSelect options');
        if(methodName.equals('getSICcodes')){
            flag=getSICcodes(input,outMap,options);
        }
        if(methodName.equals('getSICcodesTypeAhead')){
            flag=getSICcodesTypeAhead(input,outMap,options);
        }
        return flag;
    }
 
//get options for select element
    public boolean getSICcodes(Map<String, Object> input, Map<String, Object> outMap, Map<String, Object> options){
        Map<String,String> dupmap=new Map<String,String>();
         List<Map<String,String>> selectoptions=new List<Map<String,String>>();
        String contacttypes='';
        for(Standard_Industry_Code__c c:[SELECT Name FROM Standard_Industry_Code__c where Name!=null]){
         
            contacttypes+=c.Name+';';
         
        }
     
        List<String> ctlist=new List<String>();
        if(contacttypes.contains(';')){
            for(String s:contacttypes.split(';')){
                if(s!='' && s!=null){
                    if(!dupmap.containsKey(s)){
                        ctlist.add(s);
                        dupmap.put(s,s);
                    }
                }
            }
        }
        System.debug('ctlist :'+ctlist);
        for(String s:ctlist){
            selectoptions.add(new Map<String,String>{'name'=>s,'value'=>s});
        }
        System.debug('selectoptions: '+selectoptions);
        outMap.put('options',selectoptions);
        boolean flag=true;
        return flag;
    }
    public boolean getSICcodesTypeAhead(Map<String, Object> input, Map<String, Object> outMap, Map<String, Object> options){
        Map<String,String> dupmap=new Map<String,String>();
         List<Map<String,String>> selectoptions=new List<Map<String,String>>();
        String contacttypes='';     
        try{
            System.debug('input :'+JSON.serialize(input));
            List<Map<String,String>> lookupoptions=new List<Map<String,String>>();
            String filter1;
            //Fetch individual consumer data
            if(input.containsKey('QuestionsStep')){
                Map<String,Object> stepPA=(Map<String,Object>)input.get('QuestionsStep');
                Map<String,Object> memblock=(Map<String,Object>)stepPA.get('SICTypeAhead-Block');
                filter1=(string)memblock.get('SICTypeAhead');
            }
            filter1=filter1.trim();
            string filter=filter1+'%';
            System.debug('filter :'+filter);
         
            for(Standard_Industry_Code__c c:[SELECT Id,Name,SIC_Description__c  FROM Standard_Industry_Code__c where Name LIKE :filter]){
            lookupoptions.add(new Map<String,String>{'SICId'=>String.valueOf(c.id),'SIC'=>String.valueOf(c.Name + ' - ' +c.SIC_Description__c)});
        }     
            system.debug('suggestions: '+lookupoptions);
            outMap.put('suggestions',lookupoptions);
        }catch(exception ex){
            System.debug('The following exception has occurred: ' + ex.getMessage());
            System.debug('Stacktrace -- The following exception has occurred: ' + ex.getStackTraceString());
        }
        return true;
        //====================end of new code ======================
    }
}



Below is the configuration for the typeahead element