code: def __add_range_sliders(self, x_pos=0.12):
      self.__tab_ui.add_element(
          self.__tab_id, self.__slider_range_x, (x_pos, 0.62)
      )
      self.__tab_ui.add_element(
          self.__tab_id, self.__slider_range_y, (x_pos, 0.38)
      )
      self.__tab_ui.add_element(
          self.__tab_id, self.__slider_range_z, (x_pos, 0.15)
      )
  
imports: import numpy
  from dipy.utils.optpkg import optional_package
  from dipy.viz.horizon.tab import HorizonTab, build_label, color_double_slider, color_single_slider
label_desc: Use image node_id 3 for calling the PeaksTab obj's underlying member method code with example usage: obj.__add_range_sliders(x_pos) without return types