The expression return $profiler returns the type Aura\Sql\Profiler\Profiler which is incompatible with the return type mandated by Ray\Di\ProviderInterface::get() of Ray\Di\T.
In the issue above, the returned value is violating the contract defined by the
mentioned interface.
Let's take a look at an example:
interfaceHasName{/** @return string */publicfunctiongetName();}className{public$name;}classUserimplementsHasName{/** @return string|Name */publicfunctiongetName(){returnnewName('foo');// This is a violation of the ``HasName`` interface// which only allows a string value to be returned.}}
This interface has been deprecated. The supplier of the interface has supplied an explanatory message.
The explanatory message should give you some clue as to whether and when the interface will be removed and what other interface to use instead.