<｜begin▁of▁sentence｜>### Instruction:
As a radiation therapist, you might need to save a visual representation of a patient's radiation treatment plan to a file for documentation. With the use of a specific tool like CairoPlot for creating the plot, how can you save this plot to a file named 'output_plot.png'?
### Response:
import CairoPlot

# Assuming you have created a plot `plot`
fname = 'output_plot.png'
# Save the plot
plot.save(fname)
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