= Access Modifiers =

Access Modifiers can be specified  on Classes, Class (instance and class) variables and methods to set their visibility and accessibility 
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 class/instance variables with '''_''' prefix on name[[BR]]
    '''public''' is default for variables without '''_''' 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 its 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

Separate multiple by modifiers with ''',''' e.g    ....  is protected, override
     
    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 
            (same as static (in Java))

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

    is abstract::
        on class or method(s)
        Is a Template for subclasses to provide implementation of.

    is virtual::
       method is redefinable

    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''')