docstr: Add the rule staging stage subparser: manage.py rule-staging stage
docstr_tok: ["Add","the","rule","staging","stage","subparser",":","manage.py","rule-staging","stage"]
code: def _setup_rule_staging_stage_subparser(cls, subparsers):
      """Add the rule staging stage subparser: manage.py rule-staging stage"""
      rule_staging_stage_parser = generate_subparser(
          subparsers,
          "stage",
          description="Stage the provided rules",
          subcommand=True,
      )
  
      cls._add_default_rule_staging_args(rule_staging_stage_parser)
  
file_path: streamalert/streamalert_cli/rule_table.py
imports: from streamalert.shared.rule_table import RuleTable
  from streamalert_cli.utils import CLICommand, generate_subparser, UniqueSortedListAction
label_desc: Use image node_id 4 for calling the RuleStagingCommand obj's underlying member method code with example usage: obj._setup_rule_staging_stage_subparser(cls, subparsers) without return types