compile elf.ksy error
when i try to compile the elf.ksy, a exception occurred as follows:

KS compilation error:  io.kaitai.struct.format.YAMLParseException: /instances/strings/size: invalid type: expected integer, got SwitchType(Attribute(Attribute(Name(identifier(_root)),identifier(header)),identifier(bits)),Map(EnumByLabel(identifier(bits),identifier(b32)) -> IntMultiType(false,Width4,le), EnumByLabel(identifier(bits),identifier(b64)) -> IntMultiType(false,Width8,le)))

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