whole_func_string: function readYamlFile(file, cb) {
    fs.readFile(file, 'utf8', (err, data) => {
      if (err) throw err;
      cb(yaml.safeLoad(data));
    });
  }
func_code_string: function readYamlFile(file, cb) {
    fs.readFile(file, 'utf8', (err, data) => {
      if (err) throw err;
      cb(yaml.safeLoad(data));
    });
  }
func_documentation_string: Read Yaml File into Object
  @param {string} file - File path
  @param {function} cb - Callback with data
  @see readYamlFileSync