Unrecognized function or variable 'mapClutter'.

I am trying to use the built-in MATLAB function "mapClutter" but when i run the example code

map = mapClutter(10,{'Box','Plus','Circle'},'MapSize',[50 30],'MapResolution',5);

an error message returns.

[Walter Roberson]

This requires Navigation Toolbox R2020b or later

[YAAQOB AL-JAMALI]

thank you @Walter Roberson.