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Before iterating the parses in the bocage,
they must be ordered.
To create an ordering, use the
marpa_o_new()
method.
When an ordering is no longer in use, its memory can be freed
using the
marpa_o_unref()
method.
An ordering is frozen once the first tree iterator is created using it. A frozen ordering cannot be changed.
As of this writing, the only methods to order parses are internal and undocumented. This is expected to change.