...

Another method defined by every proxy class is ice_staticId, which returns the type ID string corresponding to the interface. As an example, for the Slice interface Simple in module M, the string returned by ice_staticId is "::M::Simple".

Interface Inheritance in Ruby

Inheritance relationships among Slice interfaces are maintained in the generated Ruby classes. For example:

interface A { ... }
interface B { ... }
interface C extends A, B { ... }

The generated code for CPrx uses mixins to include the operations of APrx and BPrx:

module CPrx_mixin
    include APrx_mixin
    include BPrx_mixin
end

class CPrx < ::Ice::ObjectPrx
    include ::Ice::Proxy_mixin
    include CPrx_mixin
end

Given a proxy for C, a client can invoke any operation defined for interface C, as well as any operation inherited from C's base interfaces.

Ice::ObjectPrx Class in Ruby

...