f directory levels to visit <em>beyond the initial path</em>,
 which is always visited. The value is relative to the root (<code>/</code>), not to the given initial path. E.g. given
 <code>maxDepth</code> = <code>3</code> and initial path <code>/foo/</code>, visiting will proceed up to <code>/foo/bar/</code>, where
 <code>/</code> counts as depth <code>1</code>, <code>/foo/</code> as depth <code>2</code> and <code>/foo/bar/</code> as depth <code>3</code>. A
 value lower or equal to the depth of the initial 