txt: ## concreterolehow.md
  role Metamodel::ConcreteRoleHOW
  
  Provides an implementation of a concrete instance of a role
  
  ```raku
      class Metamodel::ConcreteRoleHOW
          does Metamodel::Naming
          does Metamodel::Versioning
          does Metamodel::PrivateMethodContainer
          does Metamodel::MethodContainer
          does Metamodel::MultiMethodContainer
          does Metamodel::AttributeContainer
          does Metamodel::RoleContainer
          does Metamodel::MultipleInheritance
          does Metamodel::ArrayType
          does Metamodel::Concretization {}
  
  ```
  
  *Warning*: this class is part of the Rakudo implementation, and is not a part of the language specification.
  
  You can use this to build roles, in the same way that `ClassHOW` can be used to build classes:
  
  ```raku
  my $a = Metamodel::ConcreteRoleHOW.new_type(name => "Bar");
  $a.^compose;
  say $a.^roles; # OUTPUT: «(Mu)␤»
  
  ```
  
  The main difference with [`ClassHOW.new_type`](/type/Metamodel/ClassHOW#method_new_type) is that you can mix-in roles in this newly created one.
  
  This class is Rakudo specific, and provided only for completeness. Not really intended to be used by the final user.
  