method VariableService.existsVariableimport { VariableService } from "https://deno.land/x/windmill@v1.345.2/windmill-api/services/VariableService.ts"; existsVariable(unnamed 0: { workspace: string; path: string; }): CancelablePromise<boolean>does variable exists at path Parametersunnamed 0: { workspace: string; path: string; }ReturnsCancelablePromise<boolean>boolean variable