toJson method
Implementation
Map<String, Object?> toJson() => {
if (indexedVariables != null) 'indexedVariables': indexedVariables,
if (namedVariables != null) 'namedVariables': namedVariables,
if (presentationHint != null) 'presentationHint': presentationHint,
if (type != null) 'type': type,
'value': value,
if (variablesReference != null)
'variablesReference': variablesReference,
};