code: function namespaceBoundary(namespace, line) {
        // Demarcate a namespace "boundary" to build up an array of namespace line
        // "ranges" to be able to find which namespace a piece of code belongs to.
        if (currentNamespaceRange) {
          namespaceRanges.push(currentNamespaceRange);
        }
        if (namespace) {
          currentNamespaceRange = {
            name: namespace,
            line: line
          };
        }
      }
docs: --- Namespaces ---