Google Apps Script API
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    A ImageButton with an image displayed on it.

    var imageButton = CardService.newImageButton()
        .setAltText("An image button with an airplane icon.")
        .setIcon(CardService.Icon.AIRPLANE)
        .setOpenLink(CardService.newOpenLink()
            .setUrl("https://airplane.com"));
    
    interface ImageButton {
        setAltText(altText: string): ImageButton;
        setAuthorizationAction(action: AuthorizationAction): ImageButton;
        setComposeAction(
            action: GoogleAppsScript.Card_Service.Action,
            composedEmailType: ComposedEmailType,
        ): ImageButton;
        setIcon(icon: Icon): ImageButton;
        setIconUrl(url: string): ImageButton;
        setMaterialIcon(icon: MaterialIcon): ImageButton;
        setOnClickAction(action: GoogleAppsScript.Card_Service.Action): ImageButton;
        setOnClickOpenLinkAction(
            action: GoogleAppsScript.Card_Service.Action,
        ): ImageButton;
        setOpenLink(openLink: OpenLink): ImageButton;
    }
    Index

    Methods