Fix Get Source so it's subscriptable

[aolfat]

Description

Type of change

Does this correspond to an open issue?

Select type(s) of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have fixed any merge conflicts

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 57.75%. Comparing base (ccb04d8) to head (1636c86).

Files	Patch %	Lines
client/src/featureform/register.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1447      +/-   ##
==========================================
+ Coverage   57.72%   57.75%   +0.02%     
==========================================
  Files         195      195              
  Lines       26057    26058       +1     
  Branches      853      853              
==========================================
+ Hits        15042    15049       +7     
+ Misses       9395     9389       -6     
  Partials     1620     1620              

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