Function SCIPcollectRootStatistics 

pub unsafe extern "C" fn SCIPcollectRootStatistics(
    scip: *mut SCIP,
    datatree: *mut SCIP_DATATREE,
) -> SCIP_RETCODE

collects root statistics

@pre This method can be called if SCIP is in one of the following stages: - \ref SCIP_STAGE_SOLVING - \ref SCIP_STAGE_SOLVED