class Field

1. 8.x drupal/core/modules/field/lib/Drupal/field/Field.php \Drupal\field\Field
2. 8.x drupal/core/lib/Drupal/Core/Entity/Field/Type/Field.php \Drupal\Core\Entity\Field\Type\Field
3. 8.x drupal/core/modules/field/lib/Drupal/field/Plugin/views/field/Field.php \Drupal\field\Plugin\views\field\Field
4. 8.x drupal/core/modules/field/lib/Drupal/field/Plugin/Core/Entity/Field.php \Drupal\field\Plugin\Core\Entity\Field

field.info.inc in drupal/core/modules/field/field.info.inc

Field Info API, providing information about available fields and field types.

FieldEditForm.php in drupal/core/modules/field_ui/lib/Drupal/field_ui/Form/FieldEditForm.php

Contains \Drupal\field_ui\Form\FieldEditForm.

FieldImportCreateTest.php in drupal/core/modules/field/lib/Drupal/field/Tests/FieldImportCreateTest.php

Contains \Drupal\field\Tests\FieldImportCreateTest.

DataFieldRow::buildOptionsForm in drupal/core/modules/rest/lib/Drupal/rest/Plugin/views/row/DataFieldRow.php

Overrides \Drupal\views\Plugin\views\row\RowPluginBase::buildOptionsForm().

DisplayOverview::buildForm in drupal/core/modules/field_ui/lib/Drupal/field_ui/DisplayOverview.php

Implements \Drupal\Core\Form\FormInterface::buildForm().

field.info.yml in drupal/core/modules/field/field.info.yml

drupal/core/modules/field/field.info.yml

field.schema.yml in drupal/core/modules/field/config/schema/field.schema.yml

drupal/core/modules/field/config/schema/field.schema.yml

field_views_field_default_views_data in drupal/core/modules/field/field.views.inc

Default views data implementation for a field.

... See full list

class Field {

  /**
   * Returns the field info service.
   *
   * @return \Drupal\field\FieldInfo
   *   Returns a field info object.
   */
  public static function fieldInfo() {
    return Drupal::service('field.info');
  }

}