Steps to reproduce:
1. Create a new VFX Graph asset (use the simple loop template)
2. Open this VFX Graph
3. Add a Custom HLSL operator
4. Replace the default code by this one:

{code:c#}
void FloatFunction(in float value, out float a, out float b)
{
  a = value * 2;
  b = value * 3;
} {code}

5. Connect the output a and output b to the gravity Force input (X and Y)

Actual results: 

The VFX Graph do not compile because the function is duplicated

Expected results: 

The VFX Graph works fine

Reproducible with versions: 

6000.0.22.f1

Tested on (OS): 

Windows
Notes:

• Feedback from the Unity discussion forum: https://discussions.unity.com/t/does-two-outlets-on-a-customhlsl-node-cause-function-redefinition-error/1530174