Making "self" Apply to More Than Two Classes

I want my Lua class to be able to inherit from two different classes just so
it can use the "self" keyword to access the second class's functions. I
found that "self" only works for the first class from which the class
inherits. Example:

*class *'BaseClass1'
*function *BaseClass1:B1Print()
*print*( 'in B1 print' )
*end*

*class *'BaseClass2'
*function *BaseClass2:B2Print()
*print*( 'in B2 print' )
*end*

*class *'DerivedClass1' ( BaseClass1, BaseClass2 )
*function *DerivedClass1:__init()
BaseClass1.__init( self )
BaseClass2.__init( self )
 self:B1Print() -- works fine
self:B2Print() -- nil. 'self' can't be used to access this classes functions
 BaseClass1.B1Print( self ) -- works fine
BaseClass2.B2Print( self ) -- works fine
*end*
*
*
Is there another way around this? LuaBind docs didn't say it couldn't do
this. If it can't be done using just the luabind 'class' method, is there
another way like by appending the index table of BaseClass2 onto the index
table for DerivedClass1? If that's possible, how might I go about doing it?

Thanks.

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