code: function augmentAccumulatorTrace (accumulator, reducer) {
    const acc = module.exports.createTracedAccumulator(accumulator, reducer)
    acc.traceGraph.push(acc.traceNode)
    return acc
  }
docs: Creates and adds new traceNode to traceGraph
  @param {Accumulator} accumulator current accumulator
  @returns {Accumulator} traced accumulator