'宣言 Protected Friend Overridable Function GetInterpolatedSeriesValue( _ ByVal p As Double, _ ByVal column As IList(Of Double), _ ByVal prevItem As Integer, _ ByVal nextItem As Integer, _ ByVal unsortedPrevItem As Integer, _ ByVal unsortedNextItem As Integer, _ ByVal offset As Double, _ ByVal isSorting As Boolean _ ) As Double