convert, we then set up a conversion context
to manage the construction of a TensorRT
        <code class="docutils literal notranslate">
         <span class="pre">
          INetworkDefinition
         </span>
        </code>
        from the blocks nodes. The conversion context
records the set of converted nodes, block inputs and outputs and other information about the conversion
of the graph. This data is then used to help converters link together layers and also hold build time
information like weights