class_docstr: A Layout is an ViewableTree with ViewableElement objects as leaf
  values. Unlike ViewableTree, a Layout supports a rich display,
  displaying leaf items in a grid style layout. In addition to the
  usual ViewableTree indexing, Layout supports indexing of items by
  their row and column index in the layout.
  
  The maximum number of columns in such a layout may be controlled
  with the cols method.
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code: def __rmul__(self, other):
      return self.__mul__(other, reverse=True)
  
imports: import numpy
  import param
  from .None import traversal
  from .dimension import Dimension, Dimensioned, ViewableElement, ViewableTree
  from .ndmapping import NdMapping, UniformNdMapping
label_desc: Use image node_id 10 for calling the Layout obj's underlying member method code with example usage: obj.__rmul__(other) and returns: self