lib/indexing_db_local.js
function(collection, options, cb) {
    this.store().setItem(
      options.indexKey,
      JSON.stringify([]),
      function(err, res) {
        cb(err, [], res);
      }
    );
  }
function(collection, options, cb) {
    this.store().setItem(
      options.indexKey,
      JSON.stringify([]),
      function(err, res) {
        cb(err, [], res);
      }
    );
  }
function ( collection , options , cb ) { this . store ( ) . setItem ( options . indexKey , JSON . stringify ( [ ] ) , function ( err , res ) { cb ( err , [ ] , res ) ; } ) ; }
removes everything from index
removes everything from index