How to use the @pixi/core.Program.from function in @pixi/core

uColor: new Float32Array([1, 1, 1, 1]),
        };

        // Set defaults
        options = Object.assign({
            tint: 0xFFFFFF,
            alpha: 1,
            pluginName: 'batch',
        }, options);

        if (options.uniforms)
        {
            Object.assign(uniforms, options.uniforms);
        }

        super(options.program || Program.from(vertex, fragment), uniforms);

        /**
         * Only do update if tint or alpha changes.
         * @member {boolean}
         * @private
         * @default false
         */
        this._colorDirty = false;

        /**
         * TextureMatrix instance for this Mesh, used to track Texture changes
         *
         * @member {PIXI.TextureMatrix}
         * @readonly
         */
        this.uvMatrix = new TextureMatrix(uSampler);

constructor()
    {
        const program = Program.from(vertex, fragment);

        super(program, {});
    }
}