code: function onRowComplete () {
      if (rowTimeout) {
        clearTimeout(rowTimeout)
      }
      if (isComplete && numUpdates === 0) {
        rowTimeout = setTimeout(() => {
          // check yet again, because interpolated times could've appeared since setting timeout
          if (numUpdates === 0) {
            console.log('interpolation completed successfully (no interpolations needed)')
            callback()
          }
        }, 10000)
      }
    }
docs: Helper function to account for stop_times that are completely interpolated