set_switch_threshold_policy
Description:
Sets the switch threshold policy for this.
Note: 
      
        
    
    See [the migration guide](migrating-to-breakpoints.html#replace-adwsqueezer)
Determines when the squeezer will switch children.
If set to `ADW_FOLD_THRESHOLD_POLICY_MINIMUM`, it will only switch when the visible child cannot fit anymore. With `ADW_FOLD_THRESHOLD_POLICY_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.
Parameters:
| this | a squeezer | 
| policy | the policy to use |