Trait based helper for working with array-property

Example: 
class My
{
    use Ohanzee\Helper\Trait\Arr;
    public $data = [
        'foo' => ['bar' => 'foobar']
    ];
    protected $_config = [
        'paths' => ['logs' => '/logs/']
    ];

    // somewhere in a methods code
    ...
    // Getting $this->data['foo']['bar']
    $this->{'foo.bar'}; 
    // or
    static::$ararySrcProperty = '_config';
    $this->{'paths.logs'};// will get from the $this->_config['paths']['logs'];
    ...
}