Garbage collection rule for column families within a table.
Cells in the column family (within a table) fitting the rule will be
deleted during garbage collection.
A string gc_expression can also be used with API requests, but
that value would be superceded by a gc_rule. As a result, we
don't support that feature and instead support via native classes.
[[["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年10月30日 UTC."],[],[]]