Place the key-value pair
deprecated: true anywhere within the endpoint indented block to mark it as deprecated.
Here is an example
01: paths: 02: /pet: 03: put: 04: tags: 05: - pet 06: summary: Update an existing pet 07: description: Update an existing pet by Id 08: operationId: updatePet 09: deprecated: true # <---- Deprecation key-value entry
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