Defines the decorator shape of the connector None - Sets the decorator shape as None Arrow - Sets the decorator shape as Arrow Diamond - Sets the decorator shape as Diamond Butt - Sets the decorator shape as Butt Path - Sets the decorator shape as Path OpenArrow - Sets the decorator shape as OpenArrow Circle - Sets the decorator shape as Circle Square - Sets the decorator shape as Square Fletch - Sets the decorator shape as Fletch OpenFetch - Sets the decorator shape as OpenFetch IndentedArrow - Sets the decorator shape as Indented Arrow OutdentedArrow - Sets the decorator shape as Outdented Arrow DoubleArrow - Sets the decorator shape as DoubleArrow