public ExternTypeSymbol(INamedTypeSymbol sourceSymbol, AbstractPhaseContext context)
: base(sourceSymbol, context)
{
TryGetSystemType(sourceSymbol, out Type systemType);
SystemType = systemType;
Type udonType = UdonSharpUtils.UserTypeToUdonType(SystemType);
UdonType = (ExternTypeSymbol)(udonType == SystemType ? this : context.GetUdonTypeSymbol(sourceSymbol));
ExternSignature = CompilerUdonInterface.GetUdonTypeName(this);
}