NameError: name 'frame_rate' is not defined

Found while porting Basics / Structure / SetupDraw (see https://github.com/processing/processing-examples-mewnala/issues/110)

Code

"""
Setup and Draw.

The code inside the draw() function runs continuously
from top to bottom until the program is stopped.
"""
from mewnala import *
y = 100


def setup():
    """
    The statements in the setup() function
    execute once when the program begins
    """
    size(640, 360)    # Size must be the first statement
    stroke(255)         # Set line drawing color to white
    frame_rate(30)


def draw():
    """
    The statements in draw() are executed until the
    program is stopped. Each statement is executed in
    sequence and after the last line is read, the first
    line is executed again.
    """
    global y
    background(0)     # Set the background to black
    y = y - 1
    if y < 0:
        y = height

    line(0, y, width, y)
run()

The entry points are setup(), draw(), and run() in the posted Python example; first reproduce the NameError and inspect the Rust Processing API's exported naming for frame_rate. Confirm whether the example or API is responsible, then verify the example starts and runs without the undefined-name error.