code: @javax.annotation.Nonnull
      public java.util.Optional<java.util.Map<String,String>> optionalNamespaces() {
          return java.util.Optional.ofNullable(mNamespaces);
      }
docs: Map of language to laguage dependent namespace identifier.
  <p>
  namespace &lt;key&gt; &lt;value&gt;
  
  @return Optional of the <code>namespaces</code> field value.