The interface \Magento\Customer\Api\AccountManagementInterface has the @api annotation.
My understanding is that the meaning of this is it's "stable" and a change to the interface will require a module version change according to the semantic versioning rules.
Now, what is confusing me is that *some* of the methods declared on the interface also are annotated with @api.
For example, \Magento\Customer\Api\AccountManagementInterface::createAccountWithPasswordHash() is annotated, but \Magento\Customer\Api\AccountManagementInterface::createAccount() is not.
I would expect that an @api annotation on an interface would cover **all** of the interface methods.
Is that true? If not, what does an @api annotation on an interface even mean, if the individual methods also have to be annotated to be considered "stable"?