BB: Expose enable_plunging in collect

src/bb/collect.jl

@@ -16,6 +16,7 @@ function collect!(
     gap_limit::Float64 = 1e-4,
     print_interval::Int = 5,
     branch_rule::VariableBranchingRule = ReliabilityBranching(collect = true),
+    enable_plunging = true,
 )::NodePool
     model = read_from_file(filename)
     mip = init(optimizer)
@@ -36,6 +37,7 @@ function collect!(
         gap_limit,
         print_interval,
         branch_rule,
+        enable_plunging,
     )
 
     h5 = Hdf5Sample(replace(filename, ".mps.gz" => ".h5"))

src/bb/varbranch/reliability.jl

@@ -182,6 +182,9 @@ function find_branching_var(
 end
 
 function collect!(rule::ReliabilityBranching, h5)
+    if rule.stats.num_strong_branch_calls == 0
+        return
+    end
     h5.put_array("bb_score_var_names", to_str_array(rule.stats.score_var_names))
     h5.put_array("bb_score_features", vcat(rule.stats.score_features'...))
     h5.put_array("bb_score_targets", rule.stats.score_targets)