public function convertFromDataProvider()
{
return [['', false], ['0', false], ['1', true], ['false', false], ['true', true], ['some string', true], ['FaLsE', false], ['tRuE', true], ['tRuE', true], ['off', false], ['N', false], ['no', false], ['not no', true], [true, true], [false, false], [1, true], [0, false], [1.0, true]];
}