code: def get_first_property(elt, key, default=None, ctx=None):
      
  
      result = default
  
      properties = _get_properties(elt, keys=(key,), ctx=ctx, first=True)
  
      # set value if key exists in properties
      if key in properties:
          result = properties[key]
  
      return result
docs: Get first property related to one input key.
  
      :param elt: first property elt. Not None methods.
      :param str key: property key to get.
      :param default: default value to return if key does not exist in elt.
          properties
      :param ctx: elt ctx from where get properties. Equals elt if None. It
          allows to get function properties related to a class or instance if
          related function is defined in base class.