Allow orphan nodes (not connected to any flow)

[fvogel]

Sometimes one wants a node to be shown without a flow ( Provider A [0] Indicator 1 ).

In my case below, I must show that there is a gap and no provider can offer "Indicator 1" data.

I think this was addressed in the past and is not possible for evident reasons but would there be a way to simulate this? I was thinking of using #FFF after a flow description to hide it a bit, but one would still see the white flow overlapping other flows.

Any other option?

Sample data:

Provider A [0] Indicator 1
Provider A [1] Indicator 2
Provider A [1] Indicator 3
Provider A [1] Indicator 4
Provider A [1] Indicator 5
Provider A [1] Indicator 6
Provider A [1] Indicator 7
Provider A [1] Indicator 8
Provider A [1] Indicator 9
Provider A [1] Indicator 10
Provider A [1] Indicator 11
Provider A [1] Indicator 12
Provider A [1] Indicator 13
Provider A [1] Indicator 14
Provider A [1] Indicator 15
Provider A [1] Indicator 16
Provider A [1] Indicator 17
Provider A [1] Indicator 18
Provider A [1] Indicator 19
Provider A [1] Indicator 20
Provider B [0] Indicator 1
Provider B [1] Indicator 2
Provider B [1] Indicator 3
Provider B [1] Indicator 4
Provider B [1] Indicator 5
Provider B [1] Indicator 6
Provider B [1] Indicator 7
Provider B [1] Indicator 8
Provider B [1] Indicator 9
Provider B [1] Indicator 10
Provider B [1] Indicator 11
Provider B [1] Indicator 12
Provider B [1] Indicator 13
Provider B [1] Indicator 14
Provider B [1] Indicator 15
Provider B [1] Indicator 16
Provider B [1] Indicator 17
Provider B [1] Indicator 18
Provider B [1] Indicator 19
Provider B [1] Indicator 20
Provider C [0] Indicator 1
Provider C [1] Indicator 2
Provider C [1] Indicator 3
Provider C [1] Indicator 4
Provider C [1] Indicator 5
Provider C [1] Indicator 6
Provider C [1] Indicator 7
Provider C [1] Indicator 8
Provider C [1] Indicator 9
Provider C [1] Indicator 10
Provider C [1] Indicator 11
Provider C [1] Indicator 12
Provider C [1] Indicator 13
Provider C [1] Indicator 14
Provider C [1] Indicator 15
Provider C [1] Indicator 16
Provider C [1] Indicator 17
Provider C [1] Indicator 18
Provider C [1] Indicator 19
Provider C [1] Indicator 20