Turns Phaser.GameObjects.Particles.ParticleEmitter#on the emitter and resets the flow counter.
If this emitter is in flow mode (frequency >= 0; the default), the particle flow will start (or restart).
If this emitter is in explode mode (frequency = -1), nothing will happen. Use Phaser.GameObjects.Particles.ParticleEmitter#explode or Phaser.GameObjects.Particles.ParticleEmitter#flow instead.
This Particle Emitter.