code: def build_context():
      """Builds a javascript context."""
      threejs_url = (
          "https://www.gstatic.com/external_hosted/threejs-r98/"
      )
      _publish.javascript(url=threejs_url + "three.min.js")
      _publish.javascript(
          url=threejs_url + "examples/js/controls/OrbitControls.js"
      )
      return _js_builder.Js(mode=_js_builder.PERSISTENT)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import sys
label_desc: Use image node_id 2 for calling a global function with example usage: build_context() and returns: _js_builder