How to use the contentful-ui-extensions-sdk.locations.LOCATION_ENTRY_EDITOR function in contentful-ui-extensions-sdk

init(sdk => {
  window.sdk = sdk
  if (sdk.location.is(locations.LOCATION_ENTRY_FIELD)) {
    renderExtension()
  } else if (sdk.location.is(locations.LOCATION_PAGE)) {
    renderExtension()
  } else if (sdk.location.is(locations.LOCATION_ENTRY_SIDEBAR)) {
    renderExtension()
  } else if (sdk.location.is(locations.LOCATION_ENTRY_EDITOR)) {
    renderExtension()
  } else if (sdk.location.is(locations.LOCATION_DIALOG)) {
    renderExtension()
  }
})

init(sdk => {
  if (sdk.location.is(locations.LOCATION_ENTRY_EDITOR)) {
    render(, document.getElementById('root'));
  }
});

init(sdk => {
  if (sdk.location.is(locations.LOCATION_ENTRY_EDITOR)) {
    render(, document.getElementById('root'));
  }
});

accessToken={this.state.accessToken}
          sdk={this.props.sdk}
          client={this.state.client}
        />
      );
    }

    if (location.is(locations.LOCATION_ENTRY_SIDEBAR)) {
      if (!parameters.installation.optimizelyProjectId) {
        return ;
      }

      return ;
    }

    if (location.is(locations.LOCATION_ENTRY_EDITOR)) {
      const [valid, missingFields] = isValidContentType(sdk.contentType);

      if (!valid) {
        return ;
      }

      return (
        
      );
    }
  }