/**
 * Generates a namespace for a project based on its layer.
 *
 * @param {string} projectName - The name of the project.
 * @param {FlexLayer} isCustomerBase - Indicates the deployment layer (e.g., CUSTOMER_BASE).
 * @returns {string} The namespace string, prefixed appropriately if it's a customer base project.
 */
export declare function getDefaultNamespace(projectName: string, isCustomerBase: boolean): string;
/**
 * Generates a default project name based on the existing projects in the specified directory.
 *
 * @param {string} basePath - Base path of the project.
 * @param {string} dirName - Directory name to search for.
 * @returns {string} A default project name with an incremented index if similar projects exist.
 */
export declare function getDefaultProjectName(basePath: string, dirName?: string): string;
/**
 * Gets the default UI5 version from the system versions list by validating the first available version.
 * If the first version is valid according to the UI5 service, it returns that version; otherwise, returns an empty string.
 *
 * @param {string[]} ui5Versions Array of available versions.
 * @returns {Promise<string>} The valid UI5 version or an empty string if the first version is not valid or if there are no versions.
 */
export declare function getDefaultVersion(ui5Versions: string[]): Promise<string>;
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