code: function resolve (accumulator, resolveReducer) {
    // get Entity Spec
    const spec = accumulator.reducer.spec
    // execute lodash template against
    // accumulator value
    const value = spec.template(accumulator.value)
    // set new accumulator.value
    // this method creates a new acc object
    return Object.assign({}, accumulator, {
      value
    })
  }
docs: Resolve entity
  @param {Accumulator} accumulator
  @param {Function} resolveReducer
  @return {Promise}