Add logging.

Author: khatchad

com.ibm.wala.cast.python.ml/source/com/ibm/wala/cast/python/ml/client/PythonTensorAnalysisEngine.java

@@ -736,7 +736,11 @@ private Set<TensorType> getTensorTypes(
     logger.info("Getting tensor types for source: " + source + ".");
 
     TensorGenerator generator = TensorGeneratorFactory.getGenerator(source);
-    return generator.getTensorTypes(builder);
+
+    Set<TensorType> tensorTypes = generator.getTensorTypes(builder);
+    logger.info(() -> "Tensor types for source: " + source + " are: " + tensorTypes + ".");
+
+    return tensorTypes;
   }
 
   private Map<PointsToSetVariable, TensorType> handleShapeSourceOp(