public SFormsFastMapDirect toNormal() {
    final SFormsFastMapDirect result = mergeMaps(this.ifTrue, this.ifFalse);
    this.ifFalse = null;
    return result;
  }
Merge the holder from a split state to a normal state. If this holder is
already in a normal state, this method does nothing.
src/org/jetbrains/java/decompiler/modules/decompiler/sforms/VarMapHolder.java