code: function done( error ) {
  		if ( error && !err ) {
  			err = error;
  		}
  		if ( count === total ) {
  			debug( 'Request completed.' );
  			if ( err ) {
  				if ( ratelimit ) {
  					return clbk( err, null, ratelimit );
  				}
  				return clbk( err );
  			}
  			if ( total > 1 ) {
  				debug( 'Flattening paginated results.' );
  				data = flatten( data );
  				debug( 'Total number of results: %d', data.length );
  			}
  			return clbk( null, data, ratelimit );
  		}
  	}
docs: end FUNCTION next() 
  FUNCTION: done( [error] )
  Callback invoked upon resolving resources.
  
  @private
  @param {Error} [error] - error object
  @returns {Void}