private static String getFillerStructR1() {
		String expected =
		//@formatter:off
			"""
			/R1NS::R1
			pack()
			Structure R1NS::R1 {
			   0   R1NS::R1   24      "Self Base"
			   24   char[80]   80      "Filler for 2 Unplaceable Virtual Bases: Q1NS::Q1; Q2NS::Q2"
			}
			Length: 104 Alignment: 8
			/R1NS::R1/!internal/R1NS::R1
			pack()
			Structure R1NS::R1 {
			   0   pointer   8   {vfptr}   ""
			   8   pointer   8   {vbptr}   ""
			   16   int   4   r1   ""
			}
			Length: 24 Alignment: 8""";
		//@formatter:on
		return expected;
	}
Class to create the vftm 64-bit program and mock PDB
Ghidra/Features/PDB/src/test/java/ghidra/app/util/pdb/Vftm64ProgramCreator.java