m1.pm6

unit module m1;

our class TestClass is export {

    method foo() {
       say 'M1 TestClass foo is called'
    }
};

our sub foo() is export {
    say 'M1 foo is called!'
}

t1.p6

#use m1; 

require './m1.pm6';# <TestClass>;

m1::foo(); # both of "use m1;" and "require ..." works. 
#foo();

my $tc = m1::TestClass.new(); # only "use m1" works, "require ..." gives error of no symbol of TestClass. 
$tc.foo();