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Module: Test ORM

Entity: test_orm.message

Compute Method: _compute_double_size

Inputs Method Outputs 
for message in self:
            # This illustrates a subtle situation: message.double_size depends
            # on message.size. When the latter is computed, message.size is
            # assigned, which would normally invalidate message.double_size.
            # However, this may not happen while message.double_size is being
            # computed: the last statement below would fail, because
            # message.double_size would be undefined.
            message.double_size = 0
            size = message.size
            message.double_size = message.double_size + size

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