private function hideShowMetricsWithParams($columns, $columnsToRemove, $columnsToKeep, $emptyColumns = array())
{
if (!is_array($columns)) {
return $columns;
}
if (null !== $columnsToRemove) {
foreach ($columnsToRemove as $name) {
// if a column to remove is in the column list, remove it
if (isset($columns[$name])) {
unset($columns[$name]);
}
}
}
if (null !== $columnsToKeep) {
foreach ($columns as $name => $ignore) {
// if the current column should not be kept, remove it
$idx = array_search($name, $columnsToKeep);
if ($idx === false) {
unset($columns[$name]);
}
}
}
// remove empty columns
if (is_array($emptyColumns)) {
foreach ($emptyColumns as $column) {
if (isset($columns[$column])) {
unset($columns[$column]);
}
}
}
return $columns;
}