package innovimax.mixthem.operation;
import innovimax.mixthem.MixException;

interface ILineOperation extends IOperation {
	/**
 	* Returns the result of the operation as a LineResult object.
	* @param line1 The first line to join (maybe null)
 	* @param line2 The second line to join (maybe null)
	* @param result The previous operation result
 	* @return The result result of the operation (maybe null)
 	* @throws MixException - If an mixing error occurs
	* @see innovimax.mixthem.operation.LineResult
 	*/
	LineResult process(String line1, String line2, LineResult result) throws MixException;
}

@@ -129,48 +129,53 @@
  %09* 
-Returns the result of the operation as a
+Processes operation and set new result in the
  Lin
@@ -186,14 +186,17 @@
 ult 
-object
+parameter
 .%0A%09*
@@ -512,26 +512,20 @@
 t%0A %09*/%0A%09
-LineResult
+void
  process

Update ILineOperation.java