Not able to adjust opacity in combo chart

[Prashanth Palaniswamy]

I was working on a combo chart (which has a bar and scatter chart). I was not able to change the opacity of the point and the fill area inside the bars. 

Could someone please help me with this. Here is the link to the chart I was working on: jsfiddle 

Thanks,

Prashanth

[Prashanth Palaniswamy]

I got the answer to this question from StackOverflow. Please refer this link for the solution: https://stackoverflow.com/questions/52469670/change-opacity-of-fill-area-in-combo-chart-google-charts 

[Olav Tollefsen]

Why doesn't setting the opacity in the series property work for 'bars' as it does for 'area' in a combo chart?

This works fine:

                series: {

                    0: { targetAxisIndex: 0, type: 'line' },    // Price

                    1: { targetAxisIndex: 1, type: 'area', areaOpacity: 0.1, lineWidth: 0 },    // Volume

                },

while this does not work:

                series: {

                    0: { targetAxisIndex: 0, type: 'line' },    // Price

                    1: { targetAxisIndex: 1, type: 'bars', opacity: 0.1 },    // Volume

                },

Is this a bug, or?