"An inline variable declaration. 
 Assertions and some control structures allow inline declarations of variables.    
     firstEmployee = employees.first
     Integer|Float num"
shared abstract class Variable()
        of TypedVariable | SpecifiedVariable | UnspecifiedVariable | VariadicVariable
        extends Node() {
    "The name of the variable."
    shared formal MemberName name;
    "The type of the variable, if present.
     (If the type isn’t explicitly specified, it is inferred.)"
    shared formal Type|ValueModifier? type;
    "The definition of the variable, if present."
    shared formal Specifier? specifier;
    shared actual formal [Type|ValueModifier, LIdentifier, Specifier=]|[LIdentifier, Specifier=] children;