jeongyooneo commented on a change in pull request #5: [NEMO-27] Element Wise 
Block Write
URL: https://github.com/apache/incubator-nemo/pull/5#discussion_r187886569
 
 

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 File path: 
examples/beam/src/test/java/edu/snu/nemo/examples/beam/AlternatingLeastSquareITCase.java
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 @@ -27,6 +27,8 @@
 import org.powermock.core.classloader.annotations.PrepareForTest;
 import org.powermock.modules.junit4.PowerMockRunner;
 
+import java.util.Optional;
 
 Review comment:
   Remove the unused import from here, and all the other ITCases.

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