convenience version of `type.default` for effect values whose type is exactly the effect type (i.e., the value type does not inherit from the effect type).
set default instance for effect type `effect.this` to value `effect.this`.
NYI: UNDER DEVELOPMENT: See type.default
0.095dev (2025-08-15 12:02:22 GIT hash 301b5b75e77076d091b38f555473f9f0e31e5b5c built by fridi@fzen)
exactly the effect type (i.e., the value type does not inherit
from the effect type).
set default instance for effect type `effect.this` to value `effect.this`.
NYI: UNDER DEVELOPMENT: See type.default