src/vs/workbench/services/extensions/common/rpcProtocol.ts/MessageBuffer/readVSBuffer
class MessageBuffer:	public readVSBuffer(): VSBuffer {
		const buffLength = this._buff.readUInt32BE(this._offset); this._offset += 4;
		const buff = this._buff.slice(this._offset, this._offset + buffLength); this._offset += buffLength;
		return buff;
	}