S - a self reference to the spec typepublic static interface RSocketRequester.MetadataSpec<S extends RSocketRequester.MetadataSpec<S>>
| Modifier and Type | Method and Description | 
|---|---|
| S | metadata(Object metadata,
        MimeType mimeType)Use this to append additional metadata entries when using composite
 metadata. | 
S metadata(Object metadata, MimeType mimeType)
IllegalArgumentException is raised if this
 method is used when not using composite metadata.
 The metadata value be a concrete value or any producer of a single
 value that can be adapted to a Publisher via
 ReactiveAdapterRegistry.metadata - an Object to be encoded with a suitable
 Encoder, or a
 DataBuffermimeType - the mime type that describes the metadata