begin
open override fun beginExperiment(header: BenchmarkSummaryHeader, resume: Boolean = false): Int(source)
Records the experiment, or finds the unfinished one of the same name when resume is true. The header's KSL version is recorded on a freshly created row. Resuming leaves the existing row's version untouched: it records the version the experiment started under, which is the one its earlier problems actually ran on.