TargetConfiguredId.aspect
If empty, the id refers to the expansion of the target. If not-empty, the id refers to the expansion of an aspect applied to the (already expanded) target.
For example, when building an apple_binary that depends on proto_library
”//:foo_proto”, there will be two TargetConfigured events for
”//:foo_proto”:
- An event with an empty aspect, corresponding to actions producing language-agnostic outputs from the proto_library; and
- An event with aspect “ObjcProtoAspect”, corresponding to Objective-C code generation.

