How to use the react-jsonschema-form/lib/utils.isObject function in react-jsonschema-form

function buildOptions(schema, uiWidget) {
  // Note: uiWidget can be undefined, a string or an object; we only deal with
  // the inline option when we're provided a definition object.
  return {
    inline: isObject(uiWidget) &&
            isObject(uiWidget.options) &&
            uiWidget.options.inline,
    enumOptions: optionsList(Object.assign({
      enumNames: ['true', 'false'],
      enum: [true, false]
    }, {enumNames: schema.enumNames}))
  };
}

function buildOptions(schema, uiWidget) {
  // Note: uiWidget can be undefined, a string or an object; we only deal with
  // the inline option when we're provided a definition object.
  return {
    inline: isObject(uiWidget) &&
            isObject(uiWidget.options) &&
            uiWidget.options.inline,
    enumOptions: optionsList(Object.assign({
      enumNames: ['true', 'false'],
      enum: [true, false]
    }, {enumNames: schema.enumNames}))
  };
}