[SalesForce] Apex Class Non static AuraEnabled methods may not have parameters

I have an apex class which is the controller for a lightning component. In the class I want to pull through several different parts of different objects and return it in to the JS controller as one object. Now I am getting the errors: Non static AuraEnabled methods may not have parameters and AuraEnabled methods must be named with a prefix 'get'.

public with sharing class EBC_RelatedListsApx {

public class TableRow{
    @AuraEnabled public String type      {get;set;}
    @AuraEnabled public String body      {get;set;}
    @AuraEnabled public String dateString     {get;set;}
    @AuraEnabled public String user   {get;set;}
}

@AuraEnabled public List<TableRow> RowList {get; set;}

@AuraEnabled
public list<TableRow> WrapperDemoController(string processId){

    RowList = new List<TableRow>();
    TableRow tr;

    //ACTION
    for(arcusregserv__RS_Action__c action : [select arcusregserv__Action_Type__c, arcusregserv__Actual_Date__c, CreatedBy.Name, id from arcusregserv__RS_Action__c where arcusregserv__Activity__c =: processId order by CreatedDate desc]){

        tr = new TableRow();
        tr.type = 'Action';
        tr.body = action.arcusregserv__Action_Type__c;
        tr.dateString = string.valueOfGmt(action.arcusregserv__Actual_Date__c);
        tr.user = action.CreatedBy.Name;

        /*Add the TableRow to the List then and there*/
        RowList.add(tr);
    }

    //Chatter

    for(feedItem chatter : [select body, CreatedDate, CreatedBy.name from feedItem where parentId =: processId order by CreatedDate desc]){

        tr = new TableRow();
        tr.type = 'Chatter';
        tr.body = chatter.body;
        tr.dateString = string.valueOfGmt(date.newInstance(chatter.createdDate.year(), chatter.createdDate.month(), chatter.createdDate.day()));
        tr.user = chatter.CreatedBy.Name;

        /*Add the TableRow to the List then and there*/
        RowList.add(tr);
    }

    //ContentDocumentVersion
    List<id> contentDocumentIdList = new List<id>(new Map<id, contentDocumentLink>([select contentDocumentId from contentdocumentlink where linkedentityid =: processId]).keySet());

    String SOQL_IDs = '';
    for (Id id : contentDocumentIdList) {
        String id_in_quotes = '\''+id+'\'';
        if (SOQL_IDs!='') { SOQL_IDs+=','; }  //  add a comma if this isn't the first one
        SOQL_IDs += id_in_quotes;
    }
    String SOQL = 'select title, CreatedDate, Createdby.Name from contentVersion where contentDocumentId in ('+SOQL_IDs+')';

    for(contentVersion CV : database.query(SOQL)){

        tr = new TableRow();
        tr.type = 'CV';
        tr.body = CV.title;
        tr.dateString = string.valueOfGmt(date.newInstance(CV.createdDate.year(), CV.createdDate.month(), CV.createdDate.day()));
        tr.user = CV.CreatedBy.Name;

        /*Add the TableRow to the List then and there*/
        RowList.add(tr);
    }

    //Requisite

    for(arcusregserv__RS_Requisite__c requisite : [select arcusregserv__Status__c, CreatedDate, CreatedBy.name, id  from arcusregserv__RS_Requisite__c where arcusregserv__Process__c =: processId order by CreatedDate desc]){

        tr = new TableRow();
        tr.type = 'Requisite';
        tr.body = requisite.arcusregserv__Status__c;
        tr.dateString = string.valueOfGmt(date.newInstance(requisite.createdDate.year(), requisite.createdDate.month(), requisite.createdDate.day()));
        tr.user = requisite.CreatedBy.Name;

        /*Add the TableRow to the List then and there*/
        RowList.add(tr);
    }

    //Financial transaction

    for(arcshared__Financial_Transaction__c FT : [select arcshared__Status__c, CreatedDate, CreatedBy.name, id  from arcshared__Financial_Transaction__c where arcusregserv__Related_Process__c =: processId order by CreatedDate desc]){

        tr = new TableRow();
        tr.type = 'FinancialTransaction';
        tr.body = FT.arcshared__Status__c;
        tr.dateString = string.valueOfGmt(date.newInstance(FT.createdDate.year(), FT.createdDate.month(), FT.createdDate.day()));
        tr.user = FT.CreatedBy.Name;

        /*Add the TableRow to the List then and there*/
        RowList.add(tr);
    }

    return RowList;
}

}