[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-04-30 UTC."],[[["Cloud Firestore transactions have three concurrency modes: unspecified, pessimistic, and optimistic."],["The `CONCURRENCY_MODE_UNSPECIFIED` enum indicates that the concurrency mode is not specified."],["Pessimistic concurrency is represented by the `PESSIMISTIC` enum."],["Optimistic concurrency, which can be used with or without entity groups, is represented by `OPTIMISTIC` and `OPTIMISTIC_WITH_ENTITY_GROUPS`."]]],[]]
