Duplication of data in flutter - flutter

Question

I have a list of data "percesc", which have a repetitive number of DS_DISCIPLINA_DIS (ordered by).
I'm using a class that I found on internet to make a Accordion style of Cards that contains a "Table" for each DS_DISCIPLINA_DIS different records.
So, for each number of DS_DISCIPLINA_DIS records I want a different "Table" to put on each Card.
PercEsc = await _iAlunoRepository.getPercEscolar(TurmaAtual);
accordionChildren.clear();
String discAtual = "";
List<TableRow> linhas = [];
for (PercEscModel percesc in PercEsc) {
if (percesc.DS_DISCIPLINA_DIS != discAtual) {
if (discAtual != "") {
Table tabelaNotas = Table(children: linhas);
linhas.clear();
var newItem = Accordion(discAtual, tabelaNotas);
accordionChildren.add(newItem);
}
discAtual = percesc.DS_DISCIPLINA_DIS;
linhas.add(const TableRow(children: [
Text("Módulo", style: TextStyle(fontSize: 20.0)),
Text("Designação", style: TextStyle(fontSize: 20.0)),
Text("Nota", style: TextStyle(fontSize: 20.0))
]));
}
linha.add(TableRow(children: [
Text(percesc.DS_ABREVUNID_ORG_UNO, style: TextStyle(fontSize: 11.0)),
Text(percesc.DS_UNID_ORG_UNO, style: TextStyle(fontSize: 11.0)),
Text(percesc.QT_NOTA_AVL.replaceAll(".00", ""),
style: TextStyle(fontSize: 11.0))
]));
}
if I made this way, all accordionChildren stays with the records of the last DS_DISCIPLINA_DIS.
if I delete "linhas.clear();" line, all accordionChildren stays with all records os all DS_DISCIPLINA_DIS.
I thought that when I write "Table tabelaNotas = Table(children: linha);" I was making a new "tabelaNotas" and the old one was discarded, but it seems that it stays the same.
How can I atribute the different data to each accordionChildren?
Sorry about my english
Let me simplify the question.
if I have this code:
Table tabelaNotas = Table(children: linhas);
var newItem = Accordion(discAtual, tabelaNotas);
accordionChildren.add(newItem);
linhas.clear();
"linhas" is a "List" of data to lines of Table
After executing this line ("accordionChildren.add(newItem);"), the first child of accordionChildren has 18 lines.
But after "linhas.clear();", accordionChildren will have no lines.
I understand that flutter works with reference to objects, so if I define "Table tabelaNotas = Table(children: linhas);", the content of table wil be somehow "linked" to "linhas", and if I clear linhas, I am also clearing the content of Table.
But I want to clear (delete) "linhas" without loosing that data on accordionCildren.
Probably is something very simple, but as before last week I never had worked with flutter, I'm a little bit confused with this situation.
If anyone could help me, I will be forever grateful.

Answer 1

I found the answer
List<TableRow> linhasAux = List.from(linhas);
tabelaNotas = Table(children: linhasAux);
var newItem = Accordion(discAtual, tabelaNotas);
accordionChildren.add(newItem);
linhas.clear();
this way, I made a copy (linhasAux) of List (linhas) and added the copy to table. Now I can clear "linhas" without loose the information that were already on Table.