6920a37a00
This PR was squashed before being merged into the master branch (closes #7852).
Discussion
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[2.3][EventDispatcher] Make events lighter
| Q | A
| ------------- | ---
| Bug fix? | no
| New feature? | yes
| BC breaks? | no
| Deprecations? | yes
| Tests pass? | yes
| Fixed tickets | na
| License | MIT
| Doc PR | symfony/symfony-docs#2476
I've taken the previous discussions and taking into consideration @fabpot does not want to break BC. This PR now provides the `EventDispatcher` as an argument to listeners. I've made a second separate commit which also passes the event name.
This PR is alternative to #7582
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