Google services can filter the fields in a response using the X-Goog-FieldMask header. This can be useful in large responses, such as listing resources, where some of the fields are uninteresting.
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["\u003cp\u003eThe webpage provides documentation for the \u003ccode\u003egoogle::cloud::FieldMaskOption\u003c/code\u003e struct across multiple versions, ranging from 2.10.1 to the latest release candidate 2.37.0-rc.\u003c/p\u003e\n"],["\u003cp\u003eEach version of the \u003ccode\u003eFieldMaskOption\u003c/code\u003e struct is represented by a hyperlink to its specific documentation page, enabling users to easily navigate to the version-specific information they require.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eFieldMaskOption\u003c/code\u003e type alias is fundamentally an \u003ccode\u003estd::string\u003c/code\u003e and is used to configure server-side filtering using the \u003ccode\u003eX-Goog-FieldMask\u003c/code\u003e header.\u003c/p\u003e\n"],["\u003cp\u003eServer-side filtering with \u003ccode\u003eX-Goog-FieldMask\u003c/code\u003e allows Google services to selectively filter out unneeded fields from large responses, which can be very helpful when listing many resources.\u003c/p\u003e\n"]]],[],null,[]]
