Revert "Break Change: drop ast.Node API UnsafeArrary|Map()"

[codecov-commenter]

Codecov Report

Merging #555 (ff1132c) into main (42f95bf) will decrease coverage by 0.10%. The diff coverage is 60.00%.

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@@            Coverage Diff             @@
##             main     #555      +/-   ##
==========================================
- Coverage   78.61%   78.52%   -0.10%     
==========================================
  Files          69       69              
  Lines       10706    10713       +7     
==========================================
- Hits         8417     8412       -5     
- Misses       1924     1935      +11     
- Partials      365      366       +1     

Files	Coverage Δ
ast/buffer.go	66.47% <ø> (-4.89%)	:arrow_down:
ast/node.go	82.38% <60.00%> (-0.43%)	:arrow_down:

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