code: public boolean hasAccess(final Instance _instance,
                               final AccessType _accessType)
          throws EFapsException
      {
          return hasAccess(_instance, _accessType, null);
      }
docs: Checks, if the current context user has all access defined in the list of
  access types for the given instance.
  
  @param _instance instance for which the access must be checked
  @param _accessType list of access types which must be checked
  @throws EFapsException on error
  @return true if user has access, else false