namespace Microsoft.CodeAnalysis
{
    public abstract class Compilation
    {
        public IFunctionPointerTypeSymbol! CreateFunctionPointerTypeSymbol(ITypeSymbol! returnType, RefKind returnRefKind, ImmutableArray<ITypeSymbol!> parameterTypes, ImmutableArray<RefKind> parameterRefKinds, SignatureCallingConvention callingConvention = SignatureCallingConvention.Default, ImmutableArray<INamedTypeSymbol!> callingConventionTypes = default);
    }
}