export declare class ExecuteClusterUpgradeActionRequestBody {
    action?: string;
    private 'item_id'?;
    constructor(action?: string, itemId?: string);
    withAction(action: string): ExecuteClusterUpgradeActionRequestBody;
    withItemId(itemId: string): ExecuteClusterUpgradeActionRequestBody;
    set itemId(itemId: string | undefined);
    get itemId(): string | undefined;
}
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