* current inference context.
*/
private void setFunctionalInfo(final Env<AttrContext> env, final JCFunctionalExpression fExpr,
final Type pt, final Type descriptorType, final Type primaryTarget, final CheckContext checkContext) {
if (checkContext.inferenceContext().free(descriptorType)) {
checkContext.inferenceContext().addFreeTypeListener(List.of(pt, descriptorType), new FreeTypeListener() {
public void typesInferred(InferenceContext inferenceContext) {
setFunctionalInfo(env, fExpr, pt, inferenceContext.asInstType(descriptorType),
inferenceContext.asInstType(primaryTarget), checkContext);
}
});