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// doorstop-rs: Help library to read doorstop documents implemented in Rust.
// Copyright (C) <2024> INVAP S.E.
//
// This file is part of doorstop-rs.
//
// doorstop-rs is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
//!Help library to read doorstop documents implemented in Rust.
//!
//!Here an example of how to read a document tree and print
//!the elements of the root document sorted by level
//!
//!```
//! use crate::doorstop_rs::doorstop::document_tree::DocumentTree;
//!
//! let document_tree = DocumentTree::load("resources/reqs").unwrap();
//! let root_document = &document_tree.borrow().document;
//! for (_, each_item) in root_document.items_sorted_by_level.iter() {
//! let default_string_value = "N/A".to_string();
//! println!(
//! "{}-({}){}",
//! each_item.id.as_ref().unwrap_or_else(|| &default_string_value),
//! each_item.level.as_ref().unwrap_or_else(|| &default_string_value),
//! each_item.header.as_ref().unwrap_or_else(|| &default_string_value)
//! )
//! }
//!```