class_docstr: Implements the TAB-completion for the %%opts magic.
docstr: Get the dictionary of valid completions
docstr_tok: ["Get","the","dictionary","of","valid","completions"]
code: def setup_completer(cls):
      "Get the dictionary of valid completions"
      try:
          for element in Store.options().keys():
              options = Store.options()[".".join(element)]
              plotkws = options["plot"].allowed_keywords
              stylekws = options["style"].allowed_keywords
              dotted = ".".join(element)
              cls._completions[dotted] = (
                  plotkws,
                  stylekws if stylekws else [],
              )
      except KeyError:
          pass
      return cls._completions
  
imports: import sys
  import time
  from IPython.core.magic import Magics, line_cell_magic, line_magic, magics_class
  from IPython.display import HTML, display
  from ..core.options import Options, Store, StoreOptions, options_policy
  from ..core.pprint import InfoPrinter
  from ..operation import Compositor
  from IPython.core import page
label_desc: Use image node_id 1 for calling the OptsCompleter obj's underlying member method code with example usage: obj.setup_completer(cls) and returns: cls