import { Matrix4, Vector2, Vector3 } from "three";
export declare class Matrix2 {
    el: number[];
    set(ix: number, iy: number, jx: number, jy: number): this;
    applyVector(vec: Vector2 | Vector3): this;
    fromMatrix4(mtx4: Matrix4): void;
    setRotate(theta: number): this;
    invert(): this;
}
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