New in version 2.0.
Eject contents of container:
abjad> container = Container("c'8 d'8 e'8 f'8")
abjad> f(container)
{
c'8
d'8
e'8
f'8
}
abjad> containertools.eject_contents_of_container(container)
[Note("c'8"), Note("d'8"), Note("e'8"), Note("f'8")]
abjad> container
{}
abjad> f(container)
{
}
Return list of container contents.