class Vernier::Output::Firefox::Thread

def func_table
  size = @func_names.size
  cfunc_idx = @strings["<cfunc>"]
  is_js = @filenames.map { |fn| fn != cfunc_idx }
  line_numbers = @stack_table_hash[:func_table].fetch(:first_line).map.with_index do |line, i|
    if is_js[i] || line != 0
      line
    else
      nil
    end
  end
  {
    name: @func_names,
    isJS: is_js,
    relevantForJS: is_js,
    resource: [-1] * size, # set to unidentified for now
    fileName: @filenames,
    lineNumber: line_numbers,
    columnNumber: [nil] * size,
    #columnNumber: functions.map { _1.column },
    length: size
  }
end