code: private static String getScriptVarImpl(String scriptName, String key) {
  		Map<String, String> scVars = scriptVars.get(scriptName);
  		if (scVars == null) {
  			// No vars have been associated with this script
  			return null;
  		}
  		
  		return scVars.get(key);
  	}
docs: Internal method that gets a variable without validating the script name.
  
  @param scriptName the name of the script.
  @param key the key of the variable.
  @return the value of the variable, might be {@code null} if no value was previously set.