This device-specific transceiver wrapper is instantiated from the block-level HDL file of the example design and is described in the following files:
<project_dir>/<project_name>/<project_name>.srcs/sources1/ip/<component_name>/ synth/transceiver/<component_name>_transceiver.v[hd]
This file instances output source files from the transceiver wizard (used with Gigabit Ethernet 1000BASE-X attributes).