code: function(tech) {
          return (this.level.getConfig().bundleBuildLevels || [])
              .concat([PATH.resolve(this.root, PATH.dirname(this.getNodePrefix()), 'blocks')]);
      }
docs: Constructs array of levels to build tech from.
  
  @param {String} tech  Tech name.
  @return {Array}  Array of levels.