id: ts-string-split-index
valid:
  - 'const x = s.split(sep)'
  - 'const [a, b] = s.split(sep)'
  - 'const x = s.split(sep)[0]'
invalid:
  - 'const x = s.split(sep)[1]'
  - 'const x = s.split(sep)[2]'
  - 'const x = s.split(sep)[3]'