registerSuperPropertiesOnce method
Register super properties for events, only if no other super property with the same names has already been registered.
Calling registerSuperPropertiesOnce will never overwrite existing properties.
properties
A Map containing the super properties to register.
Implementation
void registerSuperPropertiesOnce(Map<String, dynamic> properties) {
_channel.invokeMethod<void>('registerSuperPropertiesOnce',
<String, dynamic>{'properties': properties});
}