Handle to the PDF stream object. A data stream that may be a buffer in memory, or an arbitrary user-written procedure. Typically used to extract or provide data.

Class Members:

IG_PDF_stream_open_mem_for_read	Creates a read-only PDF stream from a memory-resident buffer.
IG_PDF_stream_read_CB_register	Creates a read-only PDF stream from an arbitrary data-producing procedure.
IG_PDF_stream_write_CB_register	Creates a PDF stream from an arbitrary data-producing procedure.
IG_PDF_stream_read	Creates a read-only PDF stream from an arbitrary data-producing procedure.
IG_PDF_stream_flush	Flushes any buffered data to the specified stream.
IG_PDF_stream_close	Closes the specified stream.