/** Screen orientation for conditional constraints */
export declare enum UIOrientation {
    /** Landscape (width > height) */
    HORIZONTAL = 0,
    /** Portrait (height > width) */
    VERTICAL = 1,
    /** Active in any orientation */
    ALWAYS = 2
}
/**
 * Resolves optional orientation.
 * @param orientation Orientation to resolve
 * @returns Orientation or ALWAYS if undefined
 */
export declare function resolveOrientation(orientation?: UIOrientation): UIOrientation;