toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (insertionIndex != null) 'insertionIndex': insertionIndex!,
if (objectId != null) 'objectId': objectId!,
if (placeholderIdMappings != null)
'placeholderIdMappings': placeholderIdMappings!,
if (slideLayoutReference != null)
'slideLayoutReference': slideLayoutReference!,
};