How to interface with I2C pins?

Hello! I am trying to figure out how to send commands out via the I2C pins on the RAMPS. Is this functionally supported? I’m assuming so because it looks like I2C pins are present on the Farmduino too.

As I’d like to send commands using Farmware, I looked through the Celery Script corpus and haven’t found any I2C functionally. Am I missing something?