code: public String getAppIdentifier() {
  		String pre = isSharingTable() && Config.getConfigBoolean("prepend_shared_appids_with_space", false) ? " " : "";
  		return (getId() != null) ? getId().replaceFirst(PREFIX, pre) : "";
  	}
docs: The App identifier (the id but without the prefix 'app:').
  The identifier may start with a whitespace character e.g. " myapp".
  This indicates that the app is sharing a table with other apps.
  This is disabled by default unless 'para.prepend_shared_appids_with_space = true'
  @return the identifier (appid)