[Function: validate] {
  schema: {
    additionalProperties: false,
    properties: {
      url: [Object],
      import: [Object],
      modules: [Object],
      sourceMap: [Object],
      importLoaders: [Object],
      localsConvention: [Object],
      onlyLocals: [Object]
    },
    type: 'object'
  },
  errors: null,
  refs: {},
  refVal: [ [Circular] ],
  root: [Circular]
}