If you try to use codequery on a piece of code which doesn't use "implements" or "mixins", the prolog interpreter ends up spewing: ERROR: children/2: Undefined procedure: mixins/2.
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If you try to use codequery on a piece of code which doesn't use "implements" or "mixins", the prolog interpreter ends up spewing:
ERROR: children/2: Undefined procedure: mixins/2
.