= Access Modifiers =

Access Modifiers can be specified  on Classes, Class (instance and class) variables and methods to set their visibility and accessibility[[BR]]
These are also called 'isNames' in the Cobra doc and Discussion since they're specified with a leading '''is''' keyword.

Method Access modifiers
    '''virtual, public''' is default for methods[[BR]]

    '''protected''' is default for methods and  class/instance variables with '''_''' prefix on name[[BR]]
    '''private''' is default for methods and class/instance variables with '''_ _''' (double underscore) prefix on name[[BR]]
    '''public''' is default for variables without any '''_''' prefix

Valid 'is' keywords are 
 *       '''fake''' - specifies item has no implementation - a placeholder
 *       '''shared''' - Specifies Class (static) method or variable, 
 *       '''virtual''',   '''nonvirtual''' -  on methods, specifies that the method overridable or not 
 *       '''override''', '''new'''         - on methods specifies that a method is overriding or replacing a baseclass method of same  signature
 *       '''public''', '''protected''', '''private''', '''internal''' - specifies item visibility 
 *       '''abstract''' - specifies a template only, subclasses must define fully

Separate multiple modifiers with ''',''' e.g    ....  is protected, override
     
== Notes and Examples ==

    is fake::
       temporary for defining class/method api without implementation
e.g
{{{     
class TextWriter
    is fake

    get newLine as String
        pass
}}}
   
    is shared::
        on instance variable makes it a class variable.
        on method makes it a class method
            (effect is same as static (in C#, Java))

    is public/protected/private::
        on class, instance variable  or method(s)
        adjust visibility (default public)

    is abstract::
        on class or method(s)
        Specifies item as a template for subclasses to provide implementation of.

    is virtual::
       method is redefinable (default)

    is nonvirtual::    
        method is not redefinable
    
    is override::
        Specifies that this method implementation is a redefinition of an existing(shadowed virtual or abstract) method defined in a superclass

    is new:: 
        Designate that this method is a new one that hides the one that would have 
        been inherited from a baseclass.
        e.g
{{{
class Vehicle

    def drive is nonvirtual
        pass

class Car inherits Vehicle

    def drive is new
       pass
}}}

When a method, property or indexer has the same name and type signature as a base member, 
you must specify '''is override''' or specify '''is new''' 
or use '''base.''' in the implementation (which is an implicit '''is override''')