Iso8601.Iso8601.lead0: def of bend-time-lib@0.4.0.1
Import: import bend-time-lib@0.4.0.1/iso8601.bend as Iso8601
Lines 56-61 of bend-time-lib@0.4.0.1/iso8601.bend: https://jend.leeeet.dev/read.txt?path=bend-time-lib@0.4.0.1/iso8601.bend&start_line=56&end_line=61

import Base

def Iso8601.lead0(s: String) -> Bool:
  match s:
    case SNil{}:
      False{}
    case SCon{h, _}:
      Char.is_eq(h, '0')

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Char
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Char.is_eq
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String