code: function(pos) {
  			if (!this.range.inside(pos)) {
  				return null;
  			}
  
  			for (var i = 0, il = this.children.length, m; i < il; i++) {
  				m = this.children[i].matchDeep(pos);
  				if (m) {
  					return m;
  				}
  			};
  
  			return this.parent ? this : null;
  		}
docs: Returns deepest child of current section (or section itself)
  which includes given position.
  @param  {Number} pos
  @return {CSSSection}