Question for the GURU's LPR to USC Status I-130 with KIDS

[NArocks 13]

Here is a question.

AS an LPR you apply for your spuse and step child under one I-130.

From the VJ Guides

Following-to-Join Benefits

Please note: This section is only applicable to lawful permanent residents who did not gain their LPR status as the immediate relative of a U.S. citizen.If you had children before you became a lawful permanent resident, and your children did not physically accompany you to the United States, and you would now like your children to join you in the United States, your children may be eligible for following-to-join benefits. This means that you do not have to submit a separate Form I-130, Petition for Alien Relative, for your children, and your children will not have to wait any extra time for a visa number to become available. In this case, you can simply notify a U.S. consulate that you are a lawful permanent resident so that your children can apply for immigrant visas. If, however, you immigrated to the U.S. as an immediate relative of a U.S. citizen who did not or could not petition for your children, you will need to file a separate I-130, Petition for Alien Relative. In this case, see How Do I Bring My Child, Son or Daughter to Live in the U.S.?

Link to VJ Guide

WHat happenes if you naturlize? Will you then have to file a seperate on for the child or will they take it like it is? I ask becasue I learned that an LPR can use just one I-130 to apply for wife and child and as a USC you have to file seperatly.

Thanks