Method annotateKey

repos/effect/packages/effect/src/Schema.ts:12523–12525

(annotations: Annotations.Key<Self>)

 *   const source = Graph.addNode(mutable, "A")
 *   const target = Graph.addNode(mutable, "B")
 *   Graph.addEdge(mutable, source, target, 1)
 * })
 *
 * const encoded = Schema.encodeSync(codec)(graph)
 *
 * encoded.type // => "directed"