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rush check

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usage: rush check [-h] [--variant VARIANT] [--json]

Checks each project's package.json files and ensures that all dependencies
are of the same version throughout the repository.

Optional arguments:
  -h, --help         Show this help message and exit.
  --variant VARIANT  Run command using a variant installation configuration.
                     This parameter may alternatively specified via the
                     RUSH_VARIANT environment variable.
  --json             If this flag is specified, output will be in JSON format.