reflective call SCALA [object] method

sobject.scala

import scala.reflect.runtime.universe._;
import org.apache.spark.sql.SparkSession;
val field = spark.getClass.getDeclaredField("extensions");
field.setAccessible(true);
val extensions = field.get(spark).asInstanceOf[org.apache.spark.sql.SparkSessionExtensions];
val tpe = typeOf[org.apache.spark.sql.SparkSession];
val m = scala.reflect.runtime.currentMirror;
val im = m.reflect(m.reflectModule(tpe.typeSymbol.asClass.companion.asModule).instance);
val method = tpe.companion.decl(TermName("applyExtensions")).asMethod;\n
im.reflectMethod(method)("io.delta.sql.DeltaSparkSessionExtension" :: Nil, extensions);