init = (canvas) => {
  svgCanvas = canvas
  svgCanvas.mouseDownEvent = mouseDownEvent
  svgCanvas.mouseMoveEvent = mouseMoveEvent
  svgCanvas.dblClickEvent = dblClickEvent
  svgCanvas.mouseUpEvent = mouseUpEvent
  svgCanvas.mouseOutEvent = mouseOutEvent
  svgCanvas.DOMMouseScrollEvent = DOMMouseScrollEvent
}
@function module:undo.init
@param {module:undo.eventContext} eventContext
@returns {void}