//create a deferred through stream
var deferred = require('pull-defer').through()
pull(
  input,
  deferred,
  output
)
//nothing will happen until deferred.resolve(stream) is called.
deferred.resolve(transform)

//create a deferred through stream
var deferred = require('pull-defer').source()
pull(
  deferred,
  output
)
//nothing will happen until deferred.resolve(stream) is called.
deferred.resolve(input)

//create a deferred through stream
var deferred = require('pull-defer').sink()
pull(
  input,
  deferred
)
//nothing will happen until deferred.start(stream) is called.
deferred.resolve(output)