Subclasses should overwrite this method if they want to add custom fields to json description.
Subclasses should overwrite this method if they want to add custom fields to json description.
Tells if this selectors selects single column or many.
Tells if this selectors selects single column or many.
Input port index of the data source.
Input port index of the data source.
Used to extract public parameters in custom transformer.
Used to extract public parameters in custom transformer.
name of replicated parameter
replicated parameter
Describes default serialization of default values.
Describes default serialization of default values.
Default value of parameter
Describes json representation of this parameter.
Describes json representation of this parameter.
Optional default value of parameter. Should be of type Option[T], but we need to receive Any because Params have to use this method without knowing T.