_super
method to pass execution to the base class. But, when a data property overwrites its corresponding data property on the base class, the data property on the base class is not easily accessible. What about when you do not want to overwrite the data property on the base class, but extend it—similar to how we extend class?concatProperties
property on the class definition to define the list of properties that should be concatenated instead of overwritten.mergedProperties
property on the class definition to define the list of properties that should be merged instead of overwritten.