public void set(VarMapHolder bVarMaps) {
    this.ifTrue = bVarMaps.ifTrue;
    this.ifFalse = bVarMaps.ifFalse;
  }
Sets this holder's maps to the given maps.
This does not create copies. Any mutations to the maps of
one holder will be reflected in the other holder.
src/org/jetbrains/java/decompiler/modules/decompiler/sforms/VarMapHolder.java