https://commons.apache.org/proper/commons-io/apidocs/org/apache/commons/io/input/ObservableInputStream.AbstractBuilder.html
ObservableInputStream.AbstractBuilder (Apache Commons IO 2.22.0 API)
declaration: package: org.apache.commons.io.input, class: ObservableInputStream, class: AbstractBuilder
apache commonsioapi
https://docs.spring.io/spring-security/site/docs/current-SNAPSHOT/api/org/springframework/security/oauth2/server/authorization/AbstractOAuth2ClientRegistration.AbstractBuilder.html
AbstractOAuth2ClientRegistration.AbstractBuilder (spring-security-docs 7.0.1-SNAPSHOT API)
declaration: package: org.springframework.security.oauth2.server.authorization, class: AbstractOAuth2ClientRegistration, class: AbstractBuilder
spring securitydocssnapshotapi