ah-fs.js
function findWriteStream(arg, copy) {
  if (copy.proto !== 'ReadableState') return null
  if (copy.pipes != null && copy.pipes.proto !== 'WriteStream') return null
  return arg.pipes
}
function findWriteStream(arg, copy) {
  if (copy.proto !== 'ReadableState') return null
  if (copy.pipes != null && copy.pipes.proto !== 'WriteStream') return null
  return arg.pipes
}
function findWriteStream ( arg , copy ) { if ( copy . proto !== 'ReadableState' ) return null if ( copy . pipes != null && copy . pipes . proto !== 'WriteStream' ) return null return arg . pipes }
The WriteStream is attached to the pipes of a ReadableState
of the ReadStream that is piped into it.

If one is found, it is returned so it can be added to the copied args.

@name findWriteStream
@function
@private
@param {Object} arg the original arg found on the resource
@param {Object} copy the clone of the arg
The WriteStream is attached to the pipes of a ReadableState of the ReadStream that is piped into it .