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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def render_content(self):
 """Render the panel's content."""

        if not self.has_content:
            return ""
        template = self.template
        if isinstance(self.template, str):
            template = self.app.ps.jinja2.env.get_template(self.template)
        context = self.render_vars()
        content = template.render(app=self.app, request=self.request, **context)
        return content