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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07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 managing how set operations are performed, allowing control over merging or overwriting data.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eMerge\u003c/code\u003e property determines whether values should be merged; this will always be true if the \u003ccode\u003eFieldMask\u003c/code\u003e is non-empty, which identifies the fields to be merged.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eMergeAll\u003c/code\u003e is a static instance that will merge all fields, while \u003ccode\u003eOverwrite\u003c/code\u003e is the default option to fully overwrite target objects.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eMergeFields\u003c/code\u003e method allows specifying which fields should be merged, accepting either \u003ccode\u003eFieldPath\u003c/code\u003e or string array parameters, with empty arrays equivalent to \u003ccode\u003eMergeAll\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThis is the reference documentation for the version \u003ccode\u003e3.5.1\u003c/code\u003e of \u003ccode\u003eSetOptions\u003c/code\u003e but version history is provided to navigate through previous versions up to \u003ccode\u003e2.3.1\u003c/code\u003e and the latest \u003ccode\u003e3.10.0\u003c/code\u003e version.\u003c/p\u003e\n"]]],[],null,[]]
