Update tutorial_50.md

simply-coded · web-flow · commit 77c85cdc8d4b · 2017-03-13T10:04:27.000-05:00
diff --git a/code/tutorial_50/tutorial_50.md b/code/tutorial_50/tutorial_50.md
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+### Packages
+
+> A package is a group of class files. 
+> Packages help keep your code unique from other people so you can resolve conflicts in your code if you have two or more classes with the same name.
