createDocument abstract method
Creates a Document instance from data and signature.
Two common use cases:
- Load existing document: Provide
dataandsignaturefrom storage - Create new empty document: Omit
dataandsignature
data: Optional encoded document data (JSON string)
signature: Optional signature of the data (Base64-encoded as TransportableData)
Returns: New Document instance
Implementation
Document createDocument({String? data, TransportableData? signature});