The switch threshold policy.
Determines when the squeezer will switch children.
If set to adw.types.FoldThresholdPolicy.Minimum, it will only switch when the visible child cannot fit anymore. With adw.types.FoldThresholdPolicy.Natural, it will switch as soon as the visible child doesn'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 switching.
Deprecated: See the migration guide
Get switchThresholdPolicy property.