This will get the next bead. If this bead is the last bead in the list then this
will return the first bead.
The next bead in the list or the first bead if this is the last bead.
This will get the previous bead. If this bead is the first bead in the list then this
will return the last bead.
The previous bead in the list or the last bead if this is the first bead.
This will get the thread that this bead is part of. This is only required
for the first bead in a thread, so other beads 'may' return null.
The thread that this bead is part of.
Set the page that this bead is part of. This is a required property and must be
set when creating a new bead. The PDPage object also has a list of beads in the natural
reading order. It is recommended that you add this object to that list as well.
Parameters: page - The page that this bead is on.
Set the thread that this bead is part of. This is only required for the
first bead in a thread. Note: This property is set for you by the PDThread.setFirstBead() method.
Parameters: thread - The thread that this bead is part of.