code: public boolean containsMimeTypeForExtension (@Nonnull final String sExtension)
    {
      ValueEnforcer.notNull (sExtension, "Extension");
  
      final ICommonsList <MimeTypeInfo> aInfos = getAllInfosOfExtension (sExtension);
      return CollectionHelper.isNotEmpty (aInfos);
    }
docs: Check if any mime type is associated with the passed extension
  
  @param sExtension
  The filename extension to search. May not be <code>null</code>.
  @return <code>true</code> if at least one mime type is associated,
  <code>false</code> if no mime type is associated with the extension