[MXNET-1443] Change gluon contrib base even handlers to mixin classes

• Type: Improvement
• Status: To Do
• Priority: Minor
• Resolution: Unresolved
• Component/s: Gluon
• Assignee: Unassigned
• Reporter: Ehsan M. Kermani
• Created: 27/Jan/20 04:08
• Updated: 16/Jul/21 16:32

Description

For correctness and ease of use, the `TrainBegin` - like base handlers are in fact mixin classes. Making them mixins shows ease of compositions for users and devs.

Issue Links

• links to: GitHub Pull Request #17443