import { DeclarationOptions } from './module.declarator';
/**
 * The `MetadataManager` class provides utilities for managing metadata entries
 * within a `@Module` decorator in a TypeScript source file. It allows for the
 * insertion of new metadata entries, merging symbols with static options, and
 * handling various scenarios such as empty module decorators or existing metadata
 * properties.
 */
export declare class MetadataManager {
    private content;
    constructor(content: string);
    /**
     * Inserts a new metadata entry into the `@Module` decorator.
     *
     * @param metadata - The metadata key to insert.
     * @param symbol - The symbol to insert.
     * @param staticOptions - The static options to insert.
     * @returns The new content string.
     */
    insert(metadata: string, symbol: string, staticOptions?: DeclarationOptions['staticOptions']): string | undefined;
    /**
     * Finds the first `@Module` decorator metadata in the source file.
     *
     * @param source - The source file to search.
     * @param identifier - The identifier to match.
     * @returns The first matching `ObjectLiteralExpression` or undefined.
     */
    private findFirstDecoratorMetadata;
    /**
     * Returns an array of all nodes in the source file.
     */
    private getSourceNodes;
    /**
     * Inserts a new metadata entry into an empty `@Module` decorator.
     * This method is called when the `@Module` decorator has no properties.
     * It inserts the metadata and symbol into the decorator.
     * @param expr - The `@Module` decorator node.
     * @param metadata - The metadata key to insert.
     * @param symbol - The symbol to insert.
     * @returns The new content string.
     */
    private insertMetadataToEmptyModuleDecorator;
    /**
     * Inserts a new symbol into an existing metadata property in the `@Module` decorator.
     * This method is called when the metadata property already exists in the decorator.
     * It inserts the symbol into the existing metadata property.
     * @param source - The source file.
     * @param matchingProperties - The matching metadata properties.
     * @param symbol - The symbol to insert.
     * @param staticOptions - The static options to insert.
     * @returns The new content string.
     */
    private insertNewMetadataToDecorator;
    /**
     * Inserts a new symbol into an existing metadata property in the `@Module` decorator.
     * This method is called when the metadata property already exists in the decorator.
     * It inserts the symbol into the existing metadata property.
     * @param source - The source file.
     * @param matchingProperties - The matching metadata properties.
     * @param symbol - The symbol to insert.
     * @param staticOptions - The static options to insert.
     * @returns The new content string.
     */
    private insertSymbolToMetadata;
    /**
     * Merges a symbol with static options into a single string.
     * @param symbol - The symbol to merge.
     * @param staticOptions - The static options to merge.
     * @returns The merged string.
     */
    private mergeSymbolAndExpr;
    /**
     * Adds blank lines around an expression.
     */
    private addBlankLines;
}