code: public static <T> T get(Class<T> clazz, Collection<String> qualifiers) {
          SortedSet<String> qs = new TreeSet<String>();
          if (qualifiers != null) {
              qs.addAll(qualifiers);
          }
          return dependencyContainer.get(DependencyIdentifier.getDependencyIdentifierForClass(clazz, qs));
      }
docs: Retrieves a stored dependnecy using class object and qualifiers.
  
  @param clazz      Class type which its related dependency reference should be retrieved.
  @param qualifiers List of qualifiers to distinguish between similar types.