Must implement showCode

Author: JaroslavTulach

engine/runtime-parser/src/main/java/org/enso/compiler/core/ir/expression/IfThenElse.java

@@ -49,4 +49,16 @@ public IfThenElse copy(Expression cond, Expression trueBranch, Expression falseB
   public scala.Option<Expression> falseBranch() {
     return scala.Option.apply(falseBranchOrNull());
   }
+
+  @Override
+  public String showCode(int indent) {
+    var newIndent = indent + indentLevel;
+    var headerStr = "if " + cond().showCode(0) + " then\n" + trueBranch().showCode(newIndent);
+    var elseStr =
+        switch (falseBranchOrNull()) {
+          case Expression f -> " ".repeat(indent) + "else\n" + f.showCode(newIndent);
+          case null -> "";
+        };
+    return headerStr + "\n" + elseStr;
+  }
 }