public void foo$($ArrayList data$)$

$\{$

$\}$

$//$some code

public void foo $($ArrayList data$)$

$\{$

$\}$

$//$some code

public ArrayList foo $($ArrayList data$)$

$\{$

$\}$

$//$some code

private void foo$($List data$)$

$\{$

$\}$

$//$some code

public void foo$($ArrayList data, boolean flag$)$

$\{$

$\}$

$//$some code

Which of the statements are true regarding this code?