code: function(obj, path, value) {
    const parts = path.split('.')
  
    /* traverse existing path to nearest object */
    while (parts.length > 1 && typeof obj[parts[0]] === 'object') {
      obj = obj[parts.shift()]
    }
  
    /* set value */
    obj[parts[0]] = partsToValue(parts.slice(1), value)
  }
docs: Set a value in object denoted by dot-path
  
  @access private
  @param {object} obj source object
  @param {string} path a dot-path
  @param {mixed} value the value to set at the end of the path