[Python] What is the simplest way to add a hyperlink to a canvas element in ReportLab?

I am using ReportLab to make a pdf using Python. I want to add a shape to the canvas, and have that shape act as a hyperlink. What is the simplest way to make the rectangle in the following example link to google.com?

from reportlab.pdfgen import canvas
from reportlab.lib.units import inch

c = canvas.Canvas("hello.pdf")

# move the origin up and to the left, draw square
c.translate(inch,9*inch)
# How do I make this rectangle link to google.com?
c.rect(inch,inch,1*inch,1*inch, fill=1)

c.showPage()
c.save()

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