PSPDFPersistentCloseButtonMode

NS_ENUM(NSUInteger, PSPDFPersistentCloseButtonMode) {
    /// No persistent close button.
    PSPDFPersistentCloseButtonModeNone,
    /// Persistent close button on the left.
    PSPDFPersistentCloseButtonModeLeft,
    /// Persistent close button on the right.
    PSPDFPersistentCloseButtonModeRight
}