create_vm.rb

module Fog
  module Vsphere
    class Compute
      class Real
        def create_vm(attributes = {})
          # NOW
          # stufff goes here....
          # AFTER
          CreateVmRequest.new(connection).call(attributes)
        end

        # This methods would move to command specific class
        private
        # command specific 
      end
    end
  end
end

create_vm_request.rb

module Fog
  module Vsphere
    module Requests
      # inherits some common behaviour
      class CreateVmRequest < VsphereComputeRequest
        
        def initialize(connection)
          @connection = connection
        end
        
        def call(attributes)
          # stufff
        end
        
        private
        
        # command specific methods

      end
    end
  end
end