code: public void setKeysToSanitize(String... keysToSanitize) {
  		Assert.notNull(keysToSanitize, "KeysToSanitize must not be null");
  		this.keysToSanitize = new Pattern[keysToSanitize.length];
  		for (int i = 0; i < keysToSanitize.length; i++) {
  			this.keysToSanitize[i] = getPattern(keysToSanitize[i]);
  		}
  	}
docs: Keys that should be sanitized. Keys can be simple strings that the property ends
  with or regular expressions.
  @param keysToSanitize the keys to sanitize