Function onSome

repos/effect/packages/effect/src/SchemaGetter.ts:404–408

(
  f: (e: E, options: SchemaAST.ParseOptions) => Effect.Effect<Option.Option<T>, SchemaIssue.Issue, R>
)

 * - When input is `None`, returns `None` (no-op).
 * - When input is `Some(e)`, calls `f(e, options)` to produce the result.
 * - `f` may return `None` to omit the value, or fail with an `Issue`.
 *
 * **Example** (Transforming only present values)
 *
 * ```ts import.meta.vitest
 * import { Effect, Option, SchemaGetter } from "effect"
 *
 * const parseIfPresent = SchemaGetter.onSome<number, string>(