from tesseract_robotics.tesseract_common import ( ImportError: cannot import name 'SimpleResourceLocator' from 'tesseract_robotics.tesseract_common'

this is not SimpleResourceLocator,just i see only SimpleResourceLocatorFn,how I do use it "SimpleResourceLocator"?

why?
from tesseract_robotics.tesseract_common import ( ImportError: cannot import name 'SimpleResourceLocator' from 'tesseract_robotics.tesseract_common'