src/Baum/Node.php
protected function computeLevel() {
    list($node, $nesting) = $this->determineDepth($this);

    if ( $node->equals($this) )
      return $this->ancestors()->count();

    return $node->getLevel() + $nesting;
  }
protected function computeLevel() {
    list($node, $nesting) = $this->determineDepth($this);

    if ( $node->equals($this) )
      return $this->ancestors()->count();

    return $node->getLevel() + $nesting;
  }
Compute current node level. If could not move past ourseleves return
our ancestor count, otherwhise get the first parent level + the computed
nesting.

@return integer