SwiftDocCDocumentationExtensionDocumentationExtension.BehaviorEnumerationDocumentationExtension.BehaviorThe merge behavior in a documentation extension.enum BehaviorTopicsEnumeration Casescase appendAppend the documentation-extension content to the in-source content and process them together.case overrideCompletely override any in-source content with the content from the documentation-extension.Initializersinit?(rawValue: String)