class_docstr: Transform performing only scale and translate, in that order.
  
  Parameters
  ----------
  scale : array-like
      Scale factors for X, Y, Z axes.
  translate : array-like
      Scale factors for X, Y, Z axes.
code: def shader_map(self):
      return self._shader_map
  
imports: from __future__ import division
  import numpy
  from ...util import transforms
  from ...geometry import Rect
  from ._util import arg_to_vec4, as_vec4
  from .base_transform import BaseTransform
label_desc: Use image node_id 4 for calling the STTransform obj's underlying member method code with example usage: obj.shader_map() and returns: self