toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (budgetAmountMicros != null)
'budgetAmountMicros': budgetAmountMicros!,
if (campaignBudgetId != null) 'campaignBudgetId': campaignBudgetId!,
if (dateRange != null) 'dateRange': dateRange!,
if (description != null) 'description': description!,
};