Is there a global search feature?

variables
#1

Is there a feature that can do global search to list pistons that use a specific variable or a specific device?

For example, I want to see which pistons that are currently using $weather. Thank you

#2

For finding all the pistons that have the old code $weather, I used this method, and it worked brilliantly!

For finding other variables or devices scattered about, I use this method.

#3

Thank you!