Optional cssOptional class to set on the element used to render the connector.
Optional gapDefines a number of pixels between the end of the connector and its anchor point. Defaults to zero.
Optional hoverOptional class to set on the element used to render the connector when the mouse is hovering over the connector.
Optional stubStub defines a number of pixels that the connector travels away from its element before the connector's actual path begins.
Common options for connectors.