Function isDocTree

packages/printer/src/internal/docTree.ts:100–101

(u: unknown)

/** @internal */
export const isDocTree = (u: unknown): u is DocTree.DocTree<unknown> =>
  typeof u === "object" && u != null && DocTreeTypeId in u

/** @internal */
export const isEmptyTree = <A>(self: DocTree.DocTree<A>): self is DocTree.EmptyTree<A> => self._tag === "EmptyTree"