`spring-beans` ships a `YamlProcessor` that's used as a base class by
`YamlMapFactoryBean` and `YamlPropertiesFactoryBean`. These
implementations have a clear use case: mapping application-internal Yaml
documents for configuration or infrastructure purposes.
Since this use case rarely requires extended types support from the
underlying library, and since we're offering ways to list custom types
(since #25152), we'll restrict to java standard types only by default.
This simplifies the setup and focuses the abstract class on the core
use cases.
Closes gh-26530
58e9b187fe