[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07 UTC."],[[["\u003cp\u003eThis document provides information about the \u003ccode\u003ePrecondition\u003c/code\u003e class within the Google.Cloud.Firestore namespace, detailing its use in update operations.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003ePrecondition\u003c/code\u003e class is immutable and can check for a document's existence or a specific last update time, which is set through it's \u003ccode\u003eExists\u003c/code\u003e and \u003ccode\u003eLastUpdateTime\u003c/code\u003e properties.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eMustExist\u003c/code\u003e and \u003ccode\u003eNone\u003c/code\u003e static properties offer predefined preconditions for document existence and no preconditions respectively, and the \u003ccode\u003eLastUpdated\u003c/code\u003e method creates a precondition with a specific last update time.\u003c/p\u003e\n"],["\u003cp\u003eThe document also provides a list of previous versions of the \u003ccode\u003ePrecondition\u003c/code\u003e class, with \u003ccode\u003e3.10.0\u003c/code\u003e being the latest and \u003ccode\u003e2.3.1\u003c/code\u003e being the oldest shown.\u003c/p\u003e\n"]]],[],null,[]]
