my $obj = Module->new(log => $obj, arg1 => $arg1);

##</code><code>##

my $obj = Module->new($log, $arg1, $arg2);

##</code><code>##

my $obj = Module->new($log, %args);

##</code><code>##

sub new {
    my $self = shift;
    my $log_obj = shift;
    my %args = @_;
    
    # do stuff
}

##</code><code>##

sub new {
    my $self = bless {}, shift;
    $self->{log} = Library->log()->child('This::Module::Name');

    my $log = $self->_log()->child('new');
}
sub foo {
    my $self = shift;
    my $log = $self->_log()->child('foo');

    # do fooish type stuff
}
sub _log {
    return shift->{log};
}