I think I may be getting close, now getting this e...

# gradle

[Robert]

I think I may be getting close, now getting this error:

> Task :compileJava FAILED
/home/robert/testproto/build/generated/source/proto/main/java/sample/TestOuterClass.java:9: error: package com.google.protobuf does not exist
      com.google.protobuf.ExtensionRegistryLite registry) {

Do i have to install it on my computer or something?