before property

Object? before

OPTIONAL prior value at path, from the executor's authoritative state. ABSENT means there was no prior value (a creation); an explicit null is treated identically, so an executor MUST NOT rely on the two being distinguishable. Structured members are for rich rendering only — summary is what a surface is obliged to show, and it is where an executor states a distinction this shape cannot carry.

Implementation

final Object? before;