GADSearchRequest
@interface GADSearchRequest : GADRequestSpecifies parameters for search ads.
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                  The search ad query. DeclarationObjective-C @property (readwrite, copy, nonatomic, nullable) NSString *query;
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                  The search ad background color. DeclarationObjective-C @property (readonly, copy, nonatomic, nullable) UIColor *backgroundColor;
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                  The search ad gradient from color.DeclarationObjective-C @property (readonly, copy, nonatomic, nullable) UIColor *gradientFrom;
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                  The search ad gradient to color.DeclarationObjective-C @property (readonly, copy, nonatomic, nullable) UIColor *gradientTo;
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                  The search ad header color. DeclarationObjective-C @property (readwrite, copy, nonatomic, nullable) UIColor *headerColor;
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                  The search ad description text color. DeclarationObjective-C @property (readwrite, copy, nonatomic, nullable) UIColor *descriptionTextColor;
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                  The search ad anchor text color. DeclarationObjective-C @property (readwrite, copy, nonatomic, nullable) UIColor *anchorTextColor;
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                  The search ad text font family. DeclarationObjective-C @property (readwrite, copy, nonatomic, nullable) NSString *fontFamily;
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                  The search ad header text size. DeclarationObjective-C @property (assign, readwrite, nonatomic) NSUInteger headerTextSize;
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                  The search ad border color. DeclarationObjective-C @property (readwrite, copy, nonatomic, nullable) UIColor *borderColor;
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                  The search ad border type. DeclarationObjective-C @property (assign, readwrite, nonatomic) GADSearchBorderType borderType;
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                  The search ad border thickness. DeclarationObjective-C @property (assign, readwrite, nonatomic) NSUInteger borderThickness;
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                  The search ad custom channels. DeclarationObjective-C @property (readwrite, copy, nonatomic, nullable) NSString *customChannels;
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                  The search ad call button color. DeclarationObjective-C @property (assign, readwrite, nonatomic) GADSearchCallButtonColor callButtonColor;
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                  A solid background color for rendering the ad. The background of the ad can either be a solid color, or a gradient, which can be specified through setBackgroundGradientFrom:toColor: method. If both solid and gradient background is requested, only the latter is considered. DeclarationObjective-C - (void)setBackgroundSolid:(nonnull UIColor *)color;
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                  A linear gradient background color for rendering the ad. The background of the ad can either be a linear gradient, or a solid color, which can be specified through setBackgroundSolid method. If both solid and gradient background is requested, only the latter is considered. DeclarationObjective-C - (void)setBackgroundGradientFrom:(nonnull UIColor *)from toColor:(nonnull UIColor *)toColor;