public Boolean toBooleanSQL() {
		if (TRUE_STRINGS.contains(toLowerCase())) {
			return true;
		} else if (FALSE_STRINGS.contains(toLowerCase())) {
			return false;
		} else {
			return null;
		}
	}
public Boolean toBooleanSQL ( ) { if ( TRUE_STRINGS . contains ( toLowerCase ( ) ) ) { return true ; } else if ( FALSE_STRINGS . contains ( toLowerCase ( ) ) ) { return false ; } else { return null ; } }
Decide boolean representation of a string.