Create an Apex class that returns both contacts and leads based on a parameter.

public class ContactAndLeadSearch {
    public static List<List<sObject>> searchContactsAndLeads(String lastName){
        List<List<sObject>> searchList = [FIND  :lastName IN  NAME FIELDS 
                   						  RETURNING Lead(FirstName,LastName),Contact(FirstName,LastName)];
        System.debug(searchList);
        return searchList;
    }
}