import type { ExtendedFunctionDescriptor, CompositeFunctionDescriptor, FunctionMap, ExtendedFunctionMap } from './descriptors';
/**
 * singleton (static instance) of function library; includes utility methods
 */
export declare class FunctionLibrary {
    /** the actual functions */
    protected functions: ExtendedFunctionMap;
    RegisterMap(map: Map<string, CompositeFunctionDescriptor>): void;
    /**
     * register one or more functions. keys in the passed object are
     * considered the canonical function names, and must be (icase) unique.
     */
    Register(...maps: FunctionMap[]): void;
    /** lookup function (actual map is protected) */
    Get(name: string): ExtendedFunctionDescriptor;
    /** get a list, for AC services */
    List(filter_internal?: boolean): ExtendedFunctionMap;
    /**
     * create an alias. we clone the descriptor and use the alias as the
     * canonical name, so should work better than just a pointer.
     */
    Alias(name: string, reference: string, warn?: boolean): void;
}