/**
 * Utility class for preserving user content from existing container files.
 * Handles parsing existing containers to extract and preserve custom onInit logic and its dependencies.
 */
export declare class ContainerPreservationUtils {
    private static astParser;
    /**
     * Extracts the body of the onInit function from an existing container file.
     * @param containerPath Path to the existing container file
     * @returns The body content of the onInit function, or undefined if not found
     */
    static extractOnInitBody(containerPath: string): string | undefined;
    /**
     * Extracts imports that are used within the onInit function.
     * @param containerPath Path to the existing container file
     * @returns Array of import statements that are referenced in onInit
     */
    static extractOnInitRelatedImports(containerPath: string): string[];
    /**
     * Extracts identifiers (class names, function names, etc.) from an import statement.
     * @param importStatement The import statement text
     * @returns Array of imported identifiers
     */
    private static extractImportedIdentifiers;
    /**
     * Checks if a container file exists at the given path.
     * @param containerPath Path to check for container file
     * @returns True if the file exists
     */
    static containerExists(containerPath: string): boolean;
    /**
     * Extracts preserved content for container regeneration.
     * @param containerPath Path to the existing container file
     * @returns Object containing preserved content
     */
    static extractPreservedContent(containerPath: string): {
        onInitBody?: string;
        onInitImports?: string[];
    };
}
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