=begin pod
=TITLE class X::Attribute::Package
class X::Attribute::Package does X::Comp { }
Compile time error, thrown when the compiler encounters an attribute
declaration inside a package that does not support attributes.
For example
module A { has $.x }
dies with
===SORRY!===
A module cannot have attributes, but you tried to declare '$.x'
=head1 Methods
=head2 name
method name() returns Str:D
Returns the name of the attribute that triggered this error.
=head2 package-kind
method package-kind() returns Str:D
Returns the kind of package (package, module) that doesn't support attributes.
=end pod