options for this field definition
Protected Readonly_ReadonlyassociationReadonlycacheReadonlycolumnValidates input value for a field of this type. Null and undefined are considered valid by default. This is used for things like:
Protectedvalidate
EntityFieldDefinition for a column with a JS string type. Enforces that the string is a valid UUID and that it is lowercase. Entity requires UUIDs to be lowercase since most databases (e.g. Postgres) treat UUIDs as case-insensitive, which can lead to unexpected entity load results if mixed-case UUIDs are used.