$handle-missing-keys (string | null)
          
            scss
          
          
        
      
      
      
      $handle-missing-keys: null !default;
    A configuration option to optionally trigger warnings or errors when a token is not found:
null[default]: Will silently returnnull(mimicking the built-in Sassmap.get()function)warn: Will also throw a warningerror: Will throw an error, and stop compilation
Since 4.0.0:
        - BREAKING: Removed the 
silentoption, to match built-in Sass map access behavior. Defaults tonull. 
Since 2.2.0:
        - NEW: Provides authors with more Sass-like behavior, and more options for managing or testing when a key lookup fails
 
Author:
James Camilleri