Should I use `FirReceiverParameterSymbol#resolvedT...

# compiler

[min]

Should I use FirReceiverParameterSymbol#resolvedType or FirReceiverParameterSymbol#fir#typeRef?

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fun receiverParam(typeRef: FirTypeRef): SubstitutedMethodSignatureBuilder {
    this.functionBuilder.receiverParameter = buildReceiverParameter(fun (paramBuilder) {
        paramBuilder.typeRef = typeRef
        paramBuilder.symbol = FirReceiverParameterSymbol()
        paramBuilder.moduleData = this.session.moduleData
        paramBuilder.origin = this.key.origin
        paramBuilder.containingDeclarationSymbol = this.functionBuilder.symbol
    })
    return this
}

I want to declare a wrapper method that derives a receiverParameter: FirReceiverParameter from a given FirReceiverParameterSymbol

fun receiverParamSubstitute(source: FirReceiverParameterSymbol) {
    this.receiverParam(this.substitute(TODO()))
}

Should I pass
• @OptIn(SymbolInternals::class) source.fir.typeRef
• Or source.resolvedType.toFirResolvedTypeRef()?
The value of resolvedType seems to be based on fir.typeRef, but I don’t understand the actual exact difference.

private fun substitute(
    source: FirTypeRef,
): FirResolvedTypeRef {
    return this.substitutes.substituteOrSelf(source)
}

FYI, this is the definition of the substitute method.