app/node_modules/@babylonjs/core/Engines/Extensions/engine.textureSampler.d.ts

import type { Nullable } from "../../types";
import type { TextureSampler } from "../../Materials/Textures/textureSampler";
declare module "../../Engines/thinEngine" {
    interface ThinEngine {
        /**
         * Sets a texture sampler to the according uniform.
         * @param name The name of the uniform in the effect
         * @param sampler The sampler to apply
         */
        setTextureSampler(name: string, sampler: Nullable<TextureSampler>): void;
    }
}