"A function or value declaration." shared sealed interface FunctionOrValueDeclaration of FunctionDeclaration | ValueDeclaration satisfies NestableDeclaration { "True if this function or value is a parameter to a [[FunctionalDeclaration]]." shared formal Boolean parameter; "True if this function or value is a parameter and has a default value." shared formal Boolean defaulted; "True if this function or value is a parameter and is variadic (accepts a list of values)." shared formal Boolean variadic; }