return ( !( value instanceof Number ) || Double.isNaN( ( (Number) value ).doubleValue( ) ) );
return ( value == null ) || ( value instanceof Number && Double.isNaN( ( (Number) value ).doubleValue( ) ) );
	protected static boolean isNaN( Object value )	{		return ( !( value instanceof Number ) || Double.isNaN( ( (Number) value ).doubleValue( ) ) );	}