I use:
print(\'Pls. show this line only\');
to debug my flutter apps developed by Android Studio. However, the output in the [Run Tab] is
File > Settings > Editor > General > Console
Look for section:
Fold console lines that contain
Click the +
button on right hand side of scrollable list
Add your substring of what you'd like hidden from the Console output.
For example in Flutter, I'd remove D/
(i.e. letter D + forward slash) which are emulator debug messages.