String.to_lower: def of Base
Import: import Base
Lines 2234-2239 of Base/base.bend: https://jend.leeeet.dev/read.txt?path=Base/base.bend&start_line=2234&end_line=2239

import Base

def String.to_lower(s: String) -> String:
  match s:
    case SNil{}:
      SNil{}
    case SCon{h, t}:
      SCon{Char.to_lower(h), String.to_lower(t)}

Uses (2):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Char.to_lower
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String