declare module '@glimmer/compiler/lib/utils' {
    import type { WellKnownAttrName, WellKnownTagName } from "@glimmer/interfaces";
    export function getAttrNamespace(attrName: string): string | undefined;
    export function deflateTagName(tagName: string): string | WellKnownTagName;
    export function inflateTagName(tagName: string | WellKnownTagName): string;
    export function deflateAttrName(attrName: string): string | WellKnownAttrName;
    export function inflateAttrName(attrName: string | WellKnownAttrName): string;
}