class Scaffolding::BlockManipulator

def find_block_parent(starting_line_number, lines)
  return nil unless indentation_of(starting_line_number, lines)
  cursor = starting_line_number
  while cursor >= 0
    unless lines[cursor].match?(/^#{indentation_of(starting_line_number, lines)}/) || !lines[cursor].present?
      return cursor
    end
    cursor -= 1
  end
  nil
end