Sets the fold threshold policy for this.
See [the migration guide](migrating-to-breakpoints.html#replace-adapflap)
If set to `ADAP_FOLD_THRESHOLD_POLICY_MINIMUM`, flap will only fold when the children cannot fit anymore. With `ADAP_FOLD_THRESHOLD_POLICY_NATURAL`, it will fold as soon as children don't get their natural size.
This can be useful if you have a long ellipsizing label and want to let it ellipsize instead of immediately folding.
| this |
a flap |
| policy |
the policy to use |