The `'jumpover'` connector draws straight lines with small arcs in place of link-link intersections. (For the time being, it cannot detect intersections with `'smooth'` router links). It accepts the following additional arguments, which can be passed as the `connector.args` property:

size | number | The size of the jump (the diameter of the arc, or the length of the empty spot on the line). Defaults to `5`.
jump | string | The style of the jump. Either `'arc'` (using an Arcto SVG path command), `'cubic'` (using a Curveto path command as a normalized approximation to Arcto), or `'gap'` (leaving a blank space). Defaults to `'arc'`.
radius | number | The curve radius of the rounded corners. Default is `0`.

Example:

    link.connector('jumpover', {
        type: 'gap'
    });