https://swapcard.dev/exhibitor/leads-api/graphql-exhibitor-api-schema/interfaces/field-definition-interface
FieldDefinitionInterface | Swapcard Developer Hub
swapcarddeveloperhub
https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Field%21FieldDefinitionInterface.php/function/FieldDefinitionInterface%3A%3AgetDefaultValueCallback/9
function FieldDefinitionInterface::getDefaultValueCallback | Drupal API
functiondrupalapi