metadata property
Application-defined data attached to this order. Metadata fields are intended to store descriptive references or associations with an entity in another system or store brief information about the object. Square does not process this field; it only stores and returns it in relevant API calls. Do not use metadata to store any sensitive information (such as personally identifiable information or card details).
Keys written by applications must be 60 characters or less and must be in
the character set `a-zA-Z0-9_-`. Entries can also include metadata
generated by Square. These keys are prefixed with a namespace, separated
from the key with a ':' character.
Values have a maximum length of 255 characters.
An application can have up to 10 entries per metadata field.
Entries written by applications are private and can only be read or modified by the same application.
Implementation
final Map<String, String>? metadata;