const golang.org/x/net/http2.TrailerPrefix

2 uses

	golang.org/x/net/http2 (current package)
		server_common.go#L30: const TrailerPrefix = "Trailer:"

	google.golang.org/grpc/internal/transport
		handler_server.go#L271: 					h.Add(http2.TrailerPrefix+k, encodeMetadataHeader(k, v))