Function createArrow

createArrow(
    widthFactor: number,
): (
    canvas: AbstractCanvas2D,
    _shape: Shape,
    type: StyleArrowValue,
    pe: Point,
    unitX: number,
    unitY: number,
    size: number,
    _source: boolean,
    sw: number,
    filled: boolean,
) => () => void
Generally used to create the "classic" and "block" marker factory methods.

Here is an example the registration of a factory edge marker function with createArrow:
```
MarkerShape.addMarker('classic', EdgeMarker.createArrow(2));
MarkerShape.addMarker('blockThin', EdgeMarker.createArrow(3));
```
Parameters
- widthFactor: number
Returns (
    canvas: AbstractCanvas2D,
    _shape: Shape,
    type: StyleArrowValue,
    pe: Point,
    unitX: number,
    unitY: number,
    size: number,
    _source: boolean,
    sw: number,
    filled: boolean,
) => () => void
Since
0.18.0
- Defined in view/style/marker/edge-markers.ts:37