import * as THREE from 'three';
/**
 * A compat function for `Matrix4.invert()` / `Matrix4.getInverse()`.
 * `Matrix4.invert()` is introduced in r123 and `Matrix4.getInverse()` emits a warning.
 * We are going to use this compat for a while.
 * @param target A target matrix
 */
export declare function mat4InvertCompat<T extends THREE.Matrix4>(target: T): T;