/**
 * A collection of graph properties in a schema.
 */
export declare class DataTypeCollection extends BaseCollection<DataType> {
    private constructor();
    /**
     * Gets the schema that owns the collection.
     */
    get schema(): GraphSchema;
    /**
     * Gets the number of properties in the collection.
     */
    get size(): number;
    /**
     * Creates a subscription for a set of named events.
     */
    subscribe(events: DataTypeCollectionEvents): EventSubscription;
    /**
     * Determines whether the collection contains the specified data type.
     */
    has(type: DataTypeNameLike, packageQualifier?: string): boolean;
    /**
     * Determines whether the collection contains the specified data type.
     */
    has(type: DataTypeNameLike | DataType): boolean;
    /**
     * Gets the data type with the specified id.
     */
    get(name: DataTypeNameLike, packageQualifier?: string): DataType | undefined;
    /**
     * Gets the data type with the specified name. If one does not exist, a new 
     * data type is created.
     */
    getOrCreate<V = any>(
        name: DataTypeNameLike,
        validator?: ((value: any) => value is V) | ((value: any) => boolean)
    ): DataType<V>;
    /**
     * Gets the data type with the specified name. If one does not exist, a new 
     * data type is created.
     */
    getOrCreate<V = any>(
        name: DataTypeNameLike,
        packageQualifier?: string,
        validator?: ((value: any) => value is V) | ((value: any) => boolean)
    ): DataType<V>;
    /**
     * Gets the data type for the provided class. If one does not exist, a new 
     * data type is created.
     */
    getOrCreateClass<V = any>(ctor: new (...args: any) => V, packageQualifier?: string): DataType<V>;
    /**
     * Gets a data type that represents a union of multiple data types.
     */
    union<A extends readonly DataType[]>(...dataTypes: A): DataType<A[number] extends DataType<infer T> ? T : never>;
    /**
     * Adds a data type to the collection.
     */
    add(dataType: DataType): this;
    /**
     * Removes a data type from the collection.
     */
    delete(dataType: DataType): boolean;
    /**
     * Removes a data type from the collection.
     */
    delete(dataType: DataTypeNameLike, packageQualifier?: string): DataType | false;
    /**
     * Removes a data type from the collection.
     */
    delete(dataType: DataType | DataTypeNameLike): DataType | boolean;
    /**
     * Removes all data types from the collection.
     */
    clear(): void;
    /**
     * Gets the data types in the collection.
     */
    values(): IterableIterator<DataType>;
    /**
     * Gets the data types in the collection.
     */
    [Symbol.iterator](): IterableIterator<DataType>;
}

export interface DataTypeCollectionEvents {
    /**
     * An event raised when a data type is added to the collection.
     */
    onAdded?: (type: DataType) => void;
    /**
     * An event raised when a data type is removed from the collection.
     */
    onDeleted?: (type: DataType) => void;
}