== endpoints locked ==
ease_in true ease_in_out true back true spring true squash true existing true
== monotonic where required ==
ease_in true ease_in_out true ease_out_cubic true ease_in_quad true
== overshoot bounded + settles ==
back_overshoots true back_bounded true spring_overshoots true spring_bounded true spring_wobbles true
== squash envelope bounded ==
squash_moves true squash_two_sided true squash_bounded true
ok: easing toolkit endpoints locked + amplitudes bounded