Review

class DefinitionsRemover.Definition {
    /**
     * Value expression that acts as the right hand side of the
     * definition statement.
     */
    public abstract Node getRValue();
}

class DefinitionsRemover.IncompleteDefinition {
    @Override
    public Node getRValue() {
      return null;
    }
}

class DefinitionsRemover.FunctionDefinition {
    @Override
    public Node getRValue() {
      return function;
    }
}

class DefinitionsRemover.AssignmentDefinition {
    @Override
    public Node getRValue() {
      return assignment.getLastChild();
    }
}

class DefinitionsRemover.ObjectLiteralPropertyDefinition {
    @Override
    public Node getRValue() {
      return value;
    }
}

class DefinitionsRemover.VarDefinition {
    @Override
    public Node getRValue() {
      return name.getFirstChild();
    }

}