unary
fun <RequestT, ResponseT> unaryRpcFunction( channel: Channel, method: MethodDescriptor<RequestT, ResponseT>, callOptions: CallOptions = CallOptions.DEFAULT, headers: suspend () -> Metadata = { GrpcMetadata() }): suspend (RequestT) -> ResponseT
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Returns a function object representing a unary RPC.
The input headers may be asynchronously formed. headers will be called each time the returned RPC is called - the headers are not cached.