class_docstr: Generates a dot description of a ssa block
code: def highlight_nodes(self, nodeset, color="yellow"):
      for i in nodeset:
          self.highlights[i] = color
      return self
  
file_path: coremltools/coremltools/converters/mil/mil/visitors/dot_visitor.py
imports: from ..var import Var
label_desc: Use image node_id 3 for calling the DotVisitor obj's underlying member method code with example usage: obj.highlight_nodes(nodeset, color) and returns: self