class RuboCop::Cop::Metrics::Utils::CodeLengthCalculator

def code_length(node)
  if classlike_node?(node)
    classlike_code_length(node)
  elsif heredoc_node?(node)
    heredoc_length(node)
  else
    body = extract_body(node)
    return 0 unless body
    body.source.each_line.count { |line| !irrelevant_line?(line) }
  end
end