const label sampleFrequency(propsDict.get< label >("sampleFrequency"))
const word cloudName(propsDict.get< word >("cloud"))
const word setFormat(propsDict.getOrDefault< word >("setFormat", "vtk"))
const word UName(propsDict.getOrDefault< word >("U", "U"))
const label maxPositions(propsDict.get< label >("maxPositions"))
const label maxTracks(propsDict.getOrDefault< label >("maxTracks", -1))
const dictionary formatOptions
IOdictionary propsDict(IOobject("particleTrackProperties", runTime.constant(), mesh, IOobject::MUST_READ_IF_MODIFIED))
const wordRes fieldNames(propsDict.getOrDefault< wordRes >("fields", wordRes()))