extensions/typescript-language-features/src/commands/tsserverRequests.ts/TSServerRequestCommand/execute
class TSServerRequestCommand:	public execute(requestID: keyof TypeScriptRequests, args?: any, config?: any) {
		// A cancellation token cannot be passed through the command infrastructure
		const token = nulToken;

		// The list can be found in the TypeScript compiler as `const enum CommandTypes`,
		// to avoid extensions making calls which could affect the internal tsserver state
		// these are only read-y sorts of commands
		const allowList = [
			// Seeing the JS/DTS output for a file
			'emit-output',
			// Grabbing a file's diagnostics
			'semanticDiagnosticsSync',
			'syntacticDiagnosticsSync',
			'suggestionDiagnosticsSync',
			// Introspecting code at a position
			'quickinfo',
			'quickinfo-full',
			'completionInfo'
		];

		if (!allowList.includes(requestID)) { return; }
		return this.lazyClientHost.value.serviceClient.execute(requestID, args, token, config);
	}