Method references are specialized lambda expressions for methods that already have a name. They take the form of ``++objectReference::methodName++`` or ``++ClassName::methodName++``. When a lambda does nothing but call an existing method, it can be much clearer to use a method reference instead.
== Noncompliant Code Example
----
Set roster = transferElements(rosterSource,
() -> { return new HashSet<>(); } // Noncompliant
);
----
== Compliant Solution
----
Set roster = transferElements(rosterSource, HashSet::new);
