Utility class used for creating stacked series.
StackingUtil_cleanXNaNxcoords
                    
                ycoords
                    
                Cleans invalid x-coordinates by calculating their value based on the corresponding y-coordinate, the previous valid x-coordinate with its corresponding y-coordinate and the next valid x-coordinate with its corresponding y-coordinate. If there is no previous or next valid x-coordinate, the value will not be altered.
_cleanYNaNxcoords
                    
                ycoords
                    
                Cleans invalid y-coordinates by calculating their value based on the corresponding x-coordinate, the previous valid y-coordinate with its corresponding x-coordinate and the next valid y-coordinate with its corresponding x-coordinate. If there is no previous or next valid y-coordinate, the value will not be altered.
_getNextValidCoordValuecoords
                    
                index
                    
                Returns the next valid (numeric) value in an array if available.
Number
_getPreviousValidCoordValuecoords
                    
                index
                    
                Returns the previous valid (numeric) value in an array if available.
Number
_stackCoordinates_stackXCoordsStacks coordinates for a stacked vertical series.
_stackYCoordsStacks coordinates for a stacked horizontal series.
_stackedIndicates whether the series is stacked.