tests/UnitLibrary/rtl/adder.v - third_party/Surelog - Git at Google

 module adder();
 // rtl
 m f1();
 m f2();
 endmodule

 module m();
 // rtl
 endmodule
	module adder();
	// rtl
	m f1();
	m f2();
	endmodule

	module m();
	// rtl
	endmodule