Updates an existing holdout, and returns the updated holdout. Updating holdouts uses the semantic patch format. To make a semantic patch request, you must append `domain-model=launchdarkly.semanticpatch` to your `Content-Type` header. To learn more, read [Updates using semantic patch](https://launchdarkly.com/docs/api#updates-using-semantic-patch). ### Instructions Semantic patch requests support the following `kind` instructions for updating holdouts. <details> <summary>Click to expand instructions for <strong>updating holdouts</strong></summary> #### endHoldout Ends a holdout. ##### Parameters None. Here's an example: ```json { "comment": "Optional comment describing why the holdout is ending", "instructions": [{ "kind": "endHoldout" }] } ``` #### removeExperiment Removes an experiment from a holdout. ##### Parameters - `value`: The key of the experiment to remove Here's an example: ```json { "comment": "Optional comment describing the change", "instructions": [{ "kind": "removeExperiment", "value": "experiment-key" }] } ``` #### updateDescription Updates the description of the holdout. ##### Parameters - `value`: The new description. Here's an example: ```json { "comment": "Optional comment describing the update", "instructions": [{ "kind": "updateDescription", "value": "Updated holdout description" }] } ``` #### updateName Updates the name of the holdout. ##### Parameters - `value`: The new name. Here's an example: ```json { "comment": "Optional comment describing the update", "instructions": [{ "kind": "updateName", "value": "Updated holdout name" }] } ``` </details>