class Pry::Command::JumpTo

def process(break_level)
  break_level    = break_level.to_i
  nesting_level  = _pry_.binding_stack.size - 1
  max_nest_level = nesting_level - 1
  case break_level
  when nesting_level
    output.puts "Already at nesting level #{nesting_level}"
  when 0..max_nest_level
    _pry_.binding_stack = _pry_.binding_stack[0..break_level]
  else
    output.puts "Invalid nest level. Must be between 0 and " \
      "#{max_nest_level}. Got #{break_level}."
  end
end