Method extension for Physics in Particle System.
| GetCollisionEvents | Get the particle collision events for a GameObject. Returns the number of events written to the array. |
| GetSafeCollisionEventSize | Safe array size for use with ParticleSystem.GetCollisionEvents. |
| GetSafeTriggerParticlesSize | Safe array size for use with ParticleSystem.GetTriggerParticles. |
| GetTriggerParticles | Get the particles that met the condition in the particle trigger module. Returns the number of particles written to the array. |
| SetTriggerParticles | Write modified particles back to the Particle System, during a call to OnParticleTrigger. |