# Uses of Package
org.apache.tinkerpop.gremlin.process.traversal.step.util.event

- Packages that use org.apache.tinkerpop.gremlin.process.traversal.step.util.event
  Package | Description
  --- | ---
  org.apache.tinkerpop.gremlin.process.traversal.step |
  org.apache.tinkerpop.gremlin.process.traversal.step.filter |
  org.apache.tinkerpop.gremlin.process.traversal.step.map |
  org.apache.tinkerpop.gremlin.process.traversal.step.sideEffect |
  org.apache.tinkerpop.gremlin.process.traversal.step.util.event |
  org.apache.tinkerpop.gremlin.process.traversal.strategy.decoration |

- Classes in org.apache.tinkerpop.gremlin.process.traversal.step.util.event used by org.apache.tinkerpop.gremlin.process.traversal.step
  Class and Description
  CallbackRegistry
  Event A representation of some action that occurs on a `Graph` for a `Traversal`.

- Classes in org.apache.tinkerpop.gremlin.process.traversal.step.util.event used by org.apache.tinkerpop.gremlin.process.traversal.step.filter
  Class and Description
  CallbackRegistry
  Event A representation of some action that occurs on a `Graph` for a `Traversal`.

- Classes in org.apache.tinkerpop.gremlin.process.traversal.step.util.event used by org.apache.tinkerpop.gremlin.process.traversal.step.map
  Class and Description
  CallbackRegistry
  Event.EdgeAddedEvent Represents an action where an `Edge` is added to the `Graph`.
  Event.VertexAddedEvent Represents an action where a `Vertex` is removed from the `Graph`.

- Classes in org.apache.tinkerpop.gremlin.process.traversal.step.util.event used by org.apache.tinkerpop.gremlin.process.traversal.step.sideEffect
  Class and Description
  CallbackRegistry
  Event.ElementPropertyChangedEvent A base class for `Property` mutation events.

- Classes in org.apache.tinkerpop.gremlin.process.traversal.step.util.event used by org.apache.tinkerpop.gremlin.process.traversal.step.util.event
  Class and Description
  CallbackRegistry
  Event A representation of some action that occurs on a `Graph` for a `Traversal`.
  Event.ElementPropertyChangedEvent A base class for `Property` mutation events.
  Event.ElementPropertyEvent A base class for `Property` mutation events.
  EventCallback A `Consumer` function definition for consuming `Event` objects raised from `Step` objects at the time of execution.
  MutationListener Interface for a listener to `EventStrategy` change events.

- Classes in org.apache.tinkerpop.gremlin.process.traversal.step.util.event used by org.apache.tinkerpop.gremlin.process.traversal.strategy.decoration
  Class and Description
  Event A representation of some action that occurs on a `Graph` for a `Traversal`.
  EventCallback A `Consumer` function definition for consuming `Event` objects raised from `Step` objects at the time of execution.
  MutationListener Interface for a listener to `EventStrategy` change events.

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