Retrieves all fields in a document and converts them to an instance of
caller-specified type.
By default, server-provided timestamps that have not yet been set to their
final value will be returned as NSNull. Pass serverTimestampBehavior
to configure this behavior.
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2022-05-11 UTC."],[],[]]
