<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def save(self):
 """Save widget content."""

        file_name = fd.asksaveasfilename()
        if file_name is "" or file_name is None:
            return
        with open(file_name, "w") as f:
            f.write(self.text.get("1.0", tk.END))