How do I use template in UBlueprintFunctionLibrary

Development Programming & Scripting C++
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1 
// UReflectionUtiFB.cpp
template <typename InStructType>
float UReflectionUtiFB::GetFloatValueByFiledName(const InStructType& InStruct, const FName& FiledName)
{
	// UE_LOG(LogTemp, Warning,TEXT("FileName: %s"), *FiledName);
	const UScriptStruct* StructDefinition = InStructType::StaticStruct();
	FProperty* Property = StructDefinition->FindPropertyByName(FiledName);
	
	const float* Val = Property->ContainerPtrToValuePtr<float>(&InStruct);
	return *Val;
}

// BaseNPC.cpp
void UBaseNPC::CheckEvent()
{
	FNPCInfo NInfo;
	Info.Name = FText::FromString("Abc");
	float NPCVal = UReflectionUtiFB::GetFloatValueByFiledName<FNPCInfo>(NInfo, FName("FieldName"));
}

when i build, I got an error:

Error	LNK2019	unresolved external symbol "public: static float __cdecl UReflectionUtiFB::GetFloatValueByFiledName<struct FNPCInfo>(struct FNPCInfo const &,class FName const &)" (??$GetFloatValueByFiledName@UFNPCInfo@@@UReflectionUtiFB@@SAMAEBUFNPCInfo@@AEBVFName@@@Z) referenced in function "private: void __cdecl UBaseNPC::CheckEvent(void)" (?CheckEvent@UBaseNPC@@AEAAXXZ)

How should I use it?

help me , thank you.

2

a function template shall be defined in every translation unit in which it is implicitly instantiated