Create an instance of this class to set additional parameters for each custom event object. The
additional parameters for a custom event are keyed by the custom event label. These extras are
passed to your implementation of GADCustomEventBanner or GADCustomEventInterstitial.
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2021-03-03 UTC."],[],[],null,["# GoogleMobileAds Framework Reference\n\nGADCustomEventExtras\n====================\n\n @interface GADCustomEventExtras : NSObject \u003c../Protocols.html#/c:objc(pl)GADAdNetworkExtras\u003e\n\nCreate an instance of this class to set additional parameters for each custom event object. The\nadditional parameters for a custom event are keyed by the custom event label. These extras are\npassed to your implementation of GADCustomEventBanner or GADCustomEventInterstitial.\n- `\n ``\n ``\n `\n\n ### [-setExtras:forLabel:](#/c:objc(cs)GADCustomEventExtras(im)setExtras:forLabel:)\n\n `\n ` \n Set additional parameters for the custom event with label \\|label\\|. To remove additional\n parameters associated with \\|label\\|, pass in nil for \\|extras\\|. \n\n #### Declaration\n\n Objective-C \n\n - (void)setExtras:(nullable NSDictionary *)extras\n forLabel:(nonnull NSString *)label;\n\n- `\n ``\n ``\n `\n\n ### [-extrasForLabel:](#/c:objc(cs)GADCustomEventExtras(im)extrasForLabel:)\n\n `\n ` \n Retrieve the extras for \\|label\\|. \n\n #### Declaration\n\n Objective-C \n\n - (nullable NSDictionary *)extrasForLabel:(nonnull NSString *)label;\n\n- `\n ``\n ``\n `\n\n ### [-removeAllExtras](#/c:objc(cs)GADCustomEventExtras(im)removeAllExtras)\n\n `\n ` \n Removes all the extras set on this instance. \n\n #### Declaration\n\n Objective-C \n\n - (void)removeAllExtras;\n\n- `\n ``\n ``\n `\n\n ### [-allExtras](#/c:objc(cs)GADCustomEventExtras(im)allExtras)\n\n `\n ` \n Returns all the extras set on this instance. \n\n #### Declaration\n\n Objective-C \n\n - (nonnull NSDictionary *)allExtras;"]]