{Object} An object with a ‘done’ property whos value is a function to be called when the path drawing is finished. The callback should expect to recieve a single argument, the line string geometry. If the callbacks object contains a ‘point’ property, this function will be sent each point as they are added. If the callbacks object contains a ‘cancel’ property, this function will be called when the handler is deactivated while drawing. The cancel should expect to receive a geometry.
options
{Object} An optional object with properties to be set on the handler