code: public static String findTargetHandlerName( Map<String,String> props ) {
  		return props.get( Constants.TARGET_PROPERTY_HANDLER );
  	}
docs: Finds the target handler name in properties.
  <p>
  This methods checks for the presence of the {@value Constants.TARGET_PROPERTY_HANDLER}
  property, or for the old {@value LEGACY_HANDLER_PROPERTY} one.
  </p>
  
  @param props non-null map
  @return a handler name, or null if none was specified