Context: How to get a customer by his ID?
Interface
https://github.com/magento/magento2/blob/ab051bf/app/code/Magento/Customer/Api/CustomerRepositoryInterface.php#L40-L49
Implementation
https://github.com/magento/magento2/blob/ab051bf/app/code/Magento/Customer/Model/ResourceModel/CustomerRepository.php#L246-L253
Usages
1
https://github.com/magento/magento2/blob/ab051bf/app/code/Magento/Backend/Model/Session/Quote.php#L144-L164
2
https://github.com/magento/magento2/blob/ab051bf/app/code/Magento/Checkout/Block/Checkout/AttributeMerger.php#L322-L335
3
https://github.com/magento/magento2/blob/ab051bf/app/code/Magento/Checkout/Controller/Action.php#L51-L69
4
https://github.com/magento/magento2/blob/ab051bf/app/code/Magento/Checkout/Model/DefaultConfigProvider.php#L316-L332
5
6
7
8
9
10
11
12
13
14
https://github.com/magento/magento2/blob/ab051bf/app/code/Magento/Customer/Controller/Account/Edit.php#L69-L80
15
https://github.com/magento/magento2/blob/ab051bf/app/code/Magento/Customer/Controller/Account/ResetPasswordPost.php#L73-L90
16
https://github.com/magento/magento2/blob/ab051bf/app/code/Magento/Customer/Controller/Adminhtml/Index/Edit.php#L29-L49