@NotNull
    Collection<XmlNamedReferenceProviderBean> byHostName(@NotNull String hostName) {
      return ContainerUtil.concat(
        ObjectUtils.notNull(myCaseSensitiveMap.get(hostName), Collections.emptyList()),
        ObjectUtils.notNull(myCaseInsensitiveMap.get(hostName), Collections.emptyList())
      );
    }
@NotNull
    Collection<XmlNamedReferenceProviderBean> byHostName(@NotNull String hostName)