PropertyHandle :: EnableKeyCheck - Enable key check

The function enables key check for evaluating filter expressions. This function can be called to improve performance for key functions that select instances from a collection by expression or context. The function can be used only, when the decision can be made based on properties, which are key components for the selected key. Otherwise, the check might return incorrect result, since all properties (attributes), which are not key components, are initialized with their initial value when checking the instance.

When the property handle refers to an operation path or transient property, key check is enabled for the result property.