(Xamarin.Forms) Setting DataTemplate for view with DataTrigger

Here is my XAML: https://paste.ofcode.org/yAqAF7mfcjfgimjNsvP9ny

My goal is this: This view has data context

SortCondition

SortCondition

. I want to set the datatemplate that I defined in resources based on a property in

SortCondition

SortCondition

(

AnotherCondtion

AnotherCondtion

, which is of type

SortCondition

SortCondition

itself). When it's set to an object I want to display the datatemplate

SortAttributeConditionTemplate

SortAttributeConditionTemplate

, but it doesnt show anything. What am I doing wrong?