public static String getProperty(InputStream input, String key) {
		return getProperty(input, key, null);
	}
public static String getProperty ( InputStream input , String key ) { return getProperty ( input , key , null ) ; }
Retrieves a value from a properties input stream.

@since 1.2
@param input the properties input stream
@param key the property key
@return the value retrieved with the supplied key