ResponsePushBuilder

interface ResponsePushBuilder

HTTP/2 push builder interface

headers	`abstract val headers: HeadersBuilder` request headers
method	`abstract var method: HttpMethod` request method
url	`abstract val url: URLBuilder` push URL
versions	`abstract val versions: MutableList<Version>` request versions (last modification date, etag and so on)

class DefaultResponsePushBuilder : ResponsePushBuilder

HTTP/2 push builder