toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (betweenFilter != null) 'betweenFilter': betweenFilter!,
if (fieldName != null) 'fieldName': fieldName!,
if (inListFilter != null) 'inListFilter': inListFilter!,
if (numericFilter != null) 'numericFilter': numericFilter!,
if (stringFilter != null) 'stringFilter': stringFilter!,
};