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# System prepended metadata

title: Concepts to Master

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# Concepts to Master

## Magento 2

- Service Contracts
-- Extension Attributes
- Patch Files
-- Revert function
-- Attributes to multiple sets/groups

### Checkout
- Shipping Restriction Module

### Admin
- Creating ACL permissions


### Common Modules
- Shipping Restriction
- Minicart Thumbnail 
- Product Attribute Patch file (including revert)
- Category Patch file (including revert)
- Product Attribute Set Patch file (including revert)
- 