src/vs/workbench/services/extensions/common/rpcProtocol.ts/MessageIO/deserializeRequestJSONArgs
class MessageIO:	public static deserializeRequestJSONArgs(buff: MessageBuffer): { rpcId: number; method: string; args: any[]; } {
		const rpcId = buff.readUInt8();
		const method = buff.readShortString();
		const args = buff.readLongString();
		return {
			rpcId: rpcId,
			method: method,
			args: JSON.parse(args)
		};
	}