src/vs/workbench/services/extensions/common/rpcProtocol.ts/MessageBuffer/readMixedArray
class MessageBuffer:	public readMixedArray(): Array<string | VSBuffer | undefined> {
		const arrLen = this._buff.readUInt8(this._offset); this._offset += 1;
		let arr: Array<string | VSBuffer | undefined> = new Array(arrLen);
		for (let i = 0; i < arrLen; i++) {
			const argType = <ArgType>this.readUInt8();
			switch (argType) {
				case ArgType.String:
					arr[i] = this.readLongString();
					break;
				case ArgType.VSBuffer:
					arr[i] = this.readVSBuffer();
					break;
				case ArgType.Undefined:
					arr[i] = undefined;
					break;
			}
		}
		return arr;
	}