text: from numpy import array, linspace, trapz, arange
  from traits.api import Array, Bool, Callable, Enum, Float, Event, HasTraits, \
      Instance, Int, Trait, ToolbarButton, Button, on_trait_change, \
      Property, cached_property, List
  from traitsui.api import Item, View, Group, Handler, HGroup
  
  from traitsui.menu import NoButtons, OKButton, CancelButton, Action, CloseAction, Menu, \
      MenuBar, Separator
  
  from .mfn_line import MFnLineArray
  
  import time
  import math
  
  
  class MFnMultiLine(HasTraits):
  
      # Public Traits
      lines = List(MFnLineArray)
  
      xdata = Property(List(Array))
  
      def _get_xdata(self):
          return [mfn.xdata for mfn in self.lines]
  
      ydata = Property(List(Array))
  
      def _get_ydata(self):
          return [mfn.ydata for mfn in self.lines]
  
      data_changed = Event
  