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virtual void pan::Data::xover_ref ( const Quark group ) [pure virtual]

The first call to xover_ref() for a group can indicate to Data to set up internal scaffolding it needs for the xover_add() calls that are about to come flooding in.

This is ref/unref rather than begin/end so that multiple connections can be used during an xref session.

See also:
xover_unref ()

Implemented in pan::DataImpl.

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