在Oracle PL / SQL中，有什么方法可以导入软件包及其成员吗？

create or replace package foo as
  f1 number := 1;
end;
/

declare
begin
  dbms_output.put_line(\'f1 = \' || foo.f1);
end;
/

declare
begin
  -- pseudocode not a valid PL/SQL
  import dbms_output.*;
  import foo.*;
  put_line(\'f1 = \' || f1);
end;
/

DECLARE
  PRAGMA IMPORT dbms_output AS d;
  PRAGMA IMPORT foo AS f;
BEGIN
  d.put_line(\'f1 = \' || f.f1);
END;
/

declare
  procedure put_line (p in varchar2) is begin dbms_output.put_line(p); end;
  function f1 return number is begin return foo.f1; end;
begin
   put_line(\'f1 = \' || f1);
end;
/