setStatTexturesMaker(statTexturesMaker) {
        this.gate.customStatTexturesMaker = statTexturesMaker;
        return this;
    }
Specifies how to extract data that will be needed when drawing a display gate.
@param {undefined|!function(!CircuitEvalContext) : (!WglTexture|!Array.<!WglTexture>)} statTexturesMaker
@returns {!GateBuilder}