Method FormatString

src/utils/prop_tree.cc:287–292

}

std::string PropTree::FormatString() {
  std::stringstream ss;
  ss << "\n";
  FormatNode("  ", root_, &ss);
  return ss.str();
}

void PropTree::FormatNode(const std::string& line_prefix, Node* node, std::stringstream* ss) {
  *ss << line_prefix << node->name_;