/usr/bin/lcm-logplayer-gui is in liblcm-bin 1.3.1+repack1-1+b1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 | #!/bin/sh
exec java -server -Xincgc -Xmx64m -Xms32m -ea -cp /usr/share/java/lcm.jar lcm.logging.LogPlayer $*
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