proxy. So-called _QuantWBIOL_ layers (such as <cite>QuantConv2d</cite>)
inherit from <cite>QuantWeightMixin</cite>, <cite>QuantBiasMixin</cite>, <cite>QuantInputMixin</cite> and <cite>QuantOutputMixin</cite>.
That means that they can quantize respectively <em>weight</em>, <em>bias</em>, <em>input</em> and <em>output</em>.
Quantizers can be passed to a <em>QuantWBIOL</em> layer by setting respectively <cite>quant_weight=</cite>, <cite>quant_bias=</cite>, <cite>quant_input=</cite>
and <cite>quant_output=</cit