code: def _element_find_from_root(
          root,  # type: ET.Element
          element_path  # type: Text
  ):
      # type: (...) -> Optional[ET.Element]
      
      element = None
  
      element_names = element_path.split('/')
      if element_names[0] == root.tag:
          if len(element_names) > 1:
              element = root.find('/'.join(element_names[1:]))
          else:
              element = root
  
      return element
docs: Find the element specified by the given path starting from the root element of the document.
  
      The first component of the element path is expected to be the name of the root element. Return
      None if the element is not found.