# `Session.describe`

> Contract 2.0.0 · package sha256 `a857eca95b35921109faf997094bb4192f12527d9d0fcd4be7e97f06425bad6e` · generated from `configurator-runtime.d.ts` by `services/onsite-scripter/scripts/build-contract-docs.mjs`; edit the source, not this file.

Method of [`Session`](Session.md) · inherited by [`testing.FakeSession`](testing.FakeSession.md) · stable · since 2.0.0 · called as `session.describe`

```ts
describe(node: string): ModelDescription | null;
```

Read class: authored. The loaded asset of a ModelNode and its manifest. Sync. Null only when
[`node`](ModelDescription.node.md) is a ModelNode of the scene model whose asset is not loaded (loading, not placed, or no
`glbUrl`) or failed.
Errors: throws HoloInputError 'unknown-id' when [`node`](ModelDescription.node.md) names no ModelNode of the scene model
(a typo, a GroupNode or MaterialNode, a removed node); `didYouMean` names close ModelNode ids.

## Generic-API test (spec 3.1)

| Rule | Result |
| --- | --- |
| 1. Neutral name | pass: `describe` names no product |
| 2. A precedent | not recorded: no ledger row (coverage.json) names this member or its owner |
| 3. Two apps, or labs | not recorded: no ledger row names this member or its owner |
| 4. The cheaper fix first | not recorded per member (Appendix B decides it per need) |