getDedicatedTableNames example

  protected function getSchemaFromStorageDefinition(FieldStorageDefinitionInterface $storage_definition) {
    assert(!$storage_definition->hasCustomStorage());
    $table_mapping = $this->getTableMapping($this->entityType, [$storage_definition]);
    $schema = [];
    if ($table_mapping->requiresDedicatedTableStorage($storage_definition)) {
      $schema = $this->getDedicatedTableSchema($storage_definition);
    }
    elseif ($table_mapping->allowsSharedTableStorage($storage_definition)) {
      $field_name = $storage_definition->getName();
      foreach (array_diff($table_mapping->getTableNames(), $table_mapping->getDedicatedTableNames()) as $table_name) {
        if (in_array($field_name, $table_mapping->getFieldNames($table_name))) {
          $column_names = $table_mapping->getColumnNames($storage_definition->getName());
          $schema[$table_name] = $this->getSharedTableFieldSchema($storage_definition, $table_name, $column_names);
        }
      }
    }
    return $schema;
  }

  /** * {@inheritdoc} */