Encodes any parameter record for use as `BatchRequest.Params`. The field is raw UTF-8 JSON, so a batch entry carries byte-for-byte what the single-shot call would have sent - there is no second encoding to keep in step, and every parameter type works here without the generator knowing anything about batching.

A batch entry for one of the methods the schema types as taking no parameters. The payload is left absent rather than sent as a literal null, which is what those methods expect inside a batch.

An empty payload is the server's `undefined`; a literal `null` is its `null`. Both mean "no result" to a caller, and both must be caught before `Deserialize` sees them - asking for a record and getting null back yields a null record rather than an exception.

The only sanctioned options for wire types. The generated records carry explicit `JsonPropertyName` attributes rather than relying on a naming policy, so the wire names are pinned even where they are not a plain camel-casing of the F# name.

A request whose result the schema says is always present.

The four AST-returning methods. The schema types their result as `SourceFileResponse = { data: string }`, a base64 blob in a JSON envelope. That describes the compiler's *async* client, which speaks JSON-RPC and so has no way to carry raw bytes - it base64s them into an envelope and decodes on arrival. This is the sync client: the msgpack transport carries bytes natively, so the AST arrives raw, with no envelope and no base64, and goes straight to the decoder.

A request taking no parameters. The schema types these as `null`, and the server rejects an empty payload, so the four bytes are required.

A request whose result the schema permits to be null.

A request that returns nothing.