class_docstr: A widget takes up a rectangular space, intended for use in
  a 2D pixel coordinate frame.
  
  The widget is positioned using the transform attribute (as any
  node), and its extent (size) is kept as a separate property.
  
  Parameters
  ----------
  pos : (x, y)
      A 2-element tuple to specify the top left corner of the widget.
  size : (w, h)
      A 2-element tuple to spicify the size of the widget.
  border_color : color
      The color of the border.
  border_width : float
      The width of the border line in pixels.
  bgcolor : color
      The background color.
  padding : int
      The amount of padding in the widget (i.e. the space reserved between
      the contents and the border).
  margin : int
      The margin to keep outside the widget's border.
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docstr: Set the minimum height of the widget
  
  Parameters
  ----------
  height_min: float
      the minimum height of the widget
docstr_tok: ["Set","the","minimum","height","of","the","widget","Parameters","--","--","--","--","--","height_min",":","float","the","minimum","height","of","the","widget"]
code: def height_min(self, height_min):
      """Set the minimum height of the widget
  
      Parameters
      ----------
      height_min: float
          the minimum height of the widget
      """
      if height_min is None:
          self._height_limits[0] = 0
          return
  
      height_min = float(height_min)
      assert height_min >= 0
  
      self._height_limits[0] = height_min
      self._update_layout()
  
imports: from __future__ import division
  import numpy
  from ..visuals import Compound
  from ...visuals.mesh import MeshVisual
  from ...visuals.transforms import STTransform
  from ...visuals.filters import Clipper
  from ...util.event import Event
  from ...geometry import Rect
  from ...color import Color
label_desc: Use image node_id 13 for calling the Widget obj's underlying member method code with example usage: obj.height_min(height_min) without return types