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+# Upgrade from 1.x to 2.0
+
+## High impact changes
+
+- Replace direct usage out output helpers with a call to the `$this->outoput->methodName()`.
+
+```diff
+// Instead of
+- $this->info('Hello world'); // A single example, but all output helpers are affected
+
+// Use
++ $this->output->info('Hello world');
+```
+
+## Medium impact changes
+
+## Low impact changes