ENH: add static set/get dimensionSet::checking() method

...ons/utilities/preProcessing/setExprFields/setExprFields.C

src/OpenFOAM/db/Time/TimePaths.H

src/OpenFOAM/db/Time/TimeState.H

src/OpenFOAM/db/Time/TimeStateI.H

src/OpenFOAM/db/Time/timeSelector.C

src/OpenFOAM/db/Time/timeSelector.H

src/OpenFOAM/dimensionSet/dimensionSet.C

src/OpenFOAM/dimensionSet/dimensionSet.H

...AM/dimensionedTypes/dimensionedMinMax/dimensionedMinMax.H

src/finiteArea/faMatrices/faMatrix/faMatrix.C

src/finiteVolume/expressions/base/fvExprDriverTemplates.C

src/finiteVolume/fvMatrices/fvMatrix/fvMatrix.C

src/functionObjects/field/log/log.C

src/functionObjects/field/pow/pow.C