A TeeDestination allows writing to two destinations at once. For example the output of a transformation
can be written simultaneously to a Serializer and to a second Transformation. By chaining together a number
of TeeDestinations it is possible to write to any number of destinations at once.
Return a Receiver. Saxon calls this method to obtain a Receiver, to which it then sends
a sequence of events representing the content of an XML document.
pipe - The Saxon configuration. This is supplied so that the destination can
use information from the configuration (for example, a reference to the name pool)
to construct or configure the returned Receiver.
params - the serialization properties
the Receiver to which events are to be sent. It is the caller's responsibility to
initialize this Receiver with a PipelineConfiguration before calling
its open() method.