func (curve *KoblitzCurve) TstFieldJacobianToBigAffine(x, y, z *fieldVal) (*big.Int, *big.Int) {
	return curve.fieldJacobianToBigAffine(x, y, z)
}
TstFieldJacobianToBigAffine makes the internal fieldJacobianToBigAffine
function available to the test package.
package btcec
import (
	"math/big"
)
const (
	TstPubkeyUncompressed = pubkeyUncompressed
	TstPubkeyCompressed   = pubkeyCompressed
	TstPubkeyHybrid       = pubkeyHybrid
)
func (f *fieldVal) TstRawInts() [10]uint32 {
	return f.n
}
func (f *fieldVal) TstSetRawInts(raw [10]uint32) *fieldVal {
	for i := 0; i < len(raw); i++ {
		f.n[i] = raw[i]
	}
	return f
}