getFlexLines() and getFlexLinesInternal() return empty list

[madhurawanniarachchi]

• I have searched existing issues and confirmed this is not a duplicate

Issues and steps to reproduce

I have tried to get a column breaking index. but every time getFlexLines() and getFlexLinesInternal() give empty list return empty list.

Expected behavior

Please describe what you expected would happen.

Version of the flexbox library

implementation 'com.google.android:flexbox:1.0.0

Link to code

FlexboxLayoutManager layoutManager = new FlexboxLayoutManager(mcontext);
layoutManager.setFlexDirection(FlexDirection.COLUMN);
layoutManager.setJustifyContent(JustifyContent.FLEX_START);
layoutManager.setFlexWrap(FlexWrap.WRAP);
myViewHolder.rvItem.setLayoutManager(layoutManager);
itemAdapter = new ItemAdapter(mcontext,mData.get(i));
myViewHolder.rvItem.setAdapter(itemAdapter);

    int a = layoutManager.getAlignContent();
    int b = layoutManager.getAlignItems();
    int c = layoutManager.getJustifyContent();
    int d = layoutManager.getMaxLine();
    int e = layoutManager.getLargestMainSize();
    //int f = layoutManager.getFlexItemCount();
    int g = layoutManager.getSumOfCrossSize();
    int h = layoutManager.getFlexWrap();
    int j = layoutManager.getChildCount();
    int k = layoutManager.getBaseline();
    int l = layoutManager.getItemCount();
    List<FlexLine>  flexLines = layoutManager.getFlexLines();
    List<FlexLine>  flexLines1 = layoutManager.getFlexLinesInternal();
    int m = layoutManager.getHeight();

    System.out.println("l_index "+ a+" "+ b+" "+c +" "+d +" "+e+" "+g+" "+h+" "+j+" "+k+" "+l+" "+flexLines+" " +flexLines1+ " "+ " " + " "+m +" ");