module Cucumber::Parser::Feature

def _nt_white
  start_index = index
  if node_cache[:white].has_key?(index)
    cached = node_cache[:white][index]
    @index = cached.interval.end if cached
    return cached
  end
  s0, i0 = [], index
  loop do
    i1 = index
    r2 = _nt_space
    if r2
      r1 = r2
    else
      r3 = _nt_eol
      if r3
        r1 = r3
      else
        @index = i1
        r1 = nil
      end
    end
    if r1
      s0 << r1
    else
      break
    end
  end
  r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
  node_cache[:white][start_index] = r0
  r0
end