extensions/typescript-language-features/src/utils/configuration.ts/TypeScriptServiceConfiguration/extractLocalTsdk
class TypeScriptServiceConfiguration:	private static extractLocalTsdk(configuration: vscode.WorkspaceConfiguration): string | null {
		const inspect = configuration.inspect('typescript.tsdk');
		if (inspect && typeof inspect.workspaceValue === 'string') {
			return this.fixPathPrefixes(inspect.workspaceValue);
		}
		return null;
	}