code: function run () {
    if (argv.file) {
      const models = require(argv.file)
      return validate(models)
    }
  
    const json = argv.model || argv.references
    if (json) {
      return validate(JSON.parse(json))
    }
  
    printUsage()
    process.exit(1)
  }
docs: } catch (err) { console.log(err.message) console.log(err.stack) }