open fun sendHead(): HttpClientRequest
Forces the head of the request to be written before io.vertx.reactivex.core.http.HttpClientRequest#end is called on the request or any data is written to it.
This is normally used to implement HTTP 100-continue handling, see for more information.
Return
a reference to this, so the API can be used fluently
open fun sendHead(completionHandler: Handler<HttpVersion>): HttpClientRequest
Like io.vertx.reactivex.core.http.HttpClientRequest#sendHead but with an handler after headers have been sent. The handler will be called with the io.vertx.reactivex.core.http.HttpVersion if it can be determined or null otherwise.
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