/// <summary>
        /// Constructs a new flux builder where the boundary conditions are
        /// evaluated using the convective fluxes defined by
        /// <paramref name="convectiveBuilder"/>.
        /// </summary>
        /// <param name="control"></param>
        /// <param name="boundaryMap"></param>
        /// <param name="speciesMap"></param>
        /// <param name="convectiveBuilder"></param>
        /// <param name="diffusiveBuilder"></param>
        public BoundaryConditionSourceFluxBuilder(
            IBMControl control, CompressibleBoundaryCondMap boundaryMap, ISpeciesMap speciesMap, FluxBuilder convectiveBuilder, FluxBuilder diffusiveBuilder)
            : base(control, boundaryMap, speciesMap)
        {
            standardOperator = new Operator(control);

            if (convectiveBuilder != null)
            {
                convectiveBuilder.BuildFluxes(standardOperator);
            }

            if (diffusiveBuilder != null)
            {
                diffusiveBuilder.BuildFluxes(standardOperator);
            }

            string levelSetBoundaryType = control.LevelSetBoundaryTag;

            boundaryCondition = boundaryMap.GetBoundaryCondition(levelSetBoundaryType);
        }