The fields to merge. An empty array is equivalent to using MergeAll.
Must not be null or contain any empty or null elements. Each field is treated as a dot-separated list of segments.
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07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\u003eThe \u003ccode\u003eSetOptions\u003c/code\u003e class in the Firestore API provides options for configuring Set operations, such as merging or overwriting data.\u003c/p\u003e\n"],["\u003cp\u003eThe latest version available for \u003ccode\u003eSetOptions\u003c/code\u003e is 3.10.0, with multiple older versions also documented and accessible.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eSetOptions\u003c/code\u003e can be used to specify whether to merge values using the \u003ccode\u003eMerge\u003c/code\u003e property, and the specific fields to merge are designated via the \u003ccode\u003eFieldMask\u003c/code\u003e property.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eMergeAll\u003c/code\u003e property merges all fields, while the \u003ccode\u003eOverwrite\u003c/code\u003e property entirely replaces the target object.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eMergeFields\u003c/code\u003e method offers the capability to merge either \u003ccode\u003eFieldPath\u003c/code\u003e or \u003ccode\u003estring\u003c/code\u003e arrays, with an empty array in either being equal to using \u003ccode\u003eMergeAll\u003c/code\u003e.\u003c/p\u003e\n"]]],[],null,[]]
