Determines whether Names represents a meaningful narrowing of the partition.
Returns true if Names is a specific subset of partition entity names,
false otherwise.
A narrowing is meaningful when Names is:
Not any (from AWS SDK's NativeAttributeValue propagation)
Not never (no resolution)
Not the full partition union (no narrowing effect)
This guard is shared across the inference chain to avoid duplicating the
three-check pattern (IsAny / never / full-union) at each fallback level.
Determines whether
Namesrepresents a meaningful narrowing of the partition. ReturnstrueifNamesis a specific subset of partition entity names,falseotherwise.A narrowing is meaningful when
Namesis:any(from AWS SDK'sNativeAttributeValuepropagation)never(no resolution)This guard is shared across the inference chain to avoid duplicating the three-check pattern (IsAny / never / full-union) at each fallback level.