TD SDK keyframes refresh(?) issue

import modo
scn = modo.Scene()

relationshipModifierItem = scn.addItem('cmChannelRelation')
chan = modo.channel.Channel('value', relationshipModifierItem)

chan.envelope.keyframes.add( 0.5, 0.5)
chan.envelope.keyframes.add( 1.5, 1.5)
chan.envelope.keyframes.add( 1.9, 1.7)

for key in chan.envelope.keyframes:
    print key

# Select the item so you can look at the animation curve
scn.deselect()
relationshipModifierItem.select()

# Can you see the three keyframes?
# Does the channel source display 'edit' until you scrub the timeline?
# Do you see the keyframes in the graph editor now?