import { type ObjectManager } from "../ObjectManager";
import { ObjectBase } from "../ObjectBase";
/**
 * The base abstract collection class.
 **/
export declare abstract class PdfCollection<TItem extends ObjectBase> extends ObjectBase {
    protected constructor(om: ObjectManager, id: number);
    /**
     * Gets the number of items in the collection.
     **/
    abstract get count(): number;
    /**
     * Gets the item with the specified index.
     * @param index The index of the item.
     **/
    abstract getAt(index: number): TItem;
    /**
     * Sets the item at the specified index.
     * @param index The index of the item, starting from 0.
     * @param item The object to set.
     **/
    abstract setAt(index: number, item: TItem): void;
    /**
     * Inserts an item at a specific position in the collection.
     * @param index The position where the item will be inserted.
     * @param item The item to insert.
     **/
    abstract insert(index: number, item: TItem): void;
    /**
     * Determines whether the item is in the collection.
     * @returns true if the item is in the collection, false otherwise.
     **/
    abstract contains(item: TItem): boolean;
    /**
     * Removes the specified item from the collection.
     * @param item The item to remove.
     * @returns true if the item was actually removed, false otherwise.
     **/
    abstract remove(item: TItem): boolean;
    /**
     * Removes the item at specified index.
     * @param index The index of the item to remove.
     **/
    abstract removeAt(index: number): void;
    /**
     * Clears the collection.
     **/
    abstract clear(): void;
    /**
     * Adds an item to the end of the collection.
     * @param item The item to add.
     **/
    add(item: TItem): void;
    /**
     * Gets last item in the collection.
     */
    get last(): TItem | null;
    [Symbol.iterator](): Generator<TItem, void, unknown>;
}