The DisplayElement#setTeleportDuration and DisplayElement#getTeleportDuration methods that correspond with the data tracker data and similar methods in the DisplayEntity class do not exist, so users must manually access the data tracker to change the teleport duration:

camera.setTeleportDuration(20); // not possible
camera.getDataTracker().set(DisplayTrackedData.TELEPORTATION_DURATION, 20); // workaround