import { type ObjectManager } from "../ObjectManager";
import { ObjectBase } from "../ObjectBase";
/**
 * The base abstract class for maps with string keys.
 **/
export declare abstract class PdfStringMap<TItem extends ObjectBase> extends ObjectBase {
    protected constructor(om: ObjectManager, id: number);
    /**
     * Gets the number of items in the map.
     **/
    abstract get count(): number;
    /**
     * Gets the item with the specified key.
     * @param index The key of the item.
     **/
    abstract get(key: string): TItem | undefined;
    /**
     * Sets the item with the specified key.
     * @param key The item key.
     * @param item The object to set.
     **/
    abstract set(key: string, item: TItem): void;
    /**
     * Adds the item with the specified key.
     * @param key The item key.
     * @param item The item to add.
     **/
    abstract add(key: string, item: TItem): void;
    /**
     * Determines whether the specified key is in the collection.
     * @returns true if the key is in the collection, false otherwise.
     **/
    abstract contains(key: string): boolean;
    /**
     * Removes the item with specified key from the collection.
     * @param key The key to remove.
     * @returns true if the item with specified key was actually removed, false otherwise.
     **/
    abstract remove(key: string): boolean;
    /**
     * Clears the collection.
     **/
    abstract clear(): void;
}