How to implement MySQL point type in 3.3?

I tried to follow the instructions in the documentation to implement a custom type ‘point,’ but I am having trouble. I added file: vendor/cakephp/cakephp/src/Database/Point.php with this code:

<?php
    namespace App\Database;
    // Our value object is immutable.
    class Point {
        protected $_lat;
        protected $_long;
        // Factory method.
        public static function parse($value) {
            // Parse the data from MySQL.
            return new static($value[0], $value[1]);
        }
        public function __construct($lat, $long) {
            $this->_lat = $lat;
            $this->_long = $long;
        }
        public function lat( {
            return $this->_lat;
        }
        public function long() {
            return $this->_long;
        }
    }
?>

Then I created file: vendor/cakephp/cakephp/src/Database/Type/PointType.php with code:

<?php namespace App\Database\Type;

use App\Database\Point;
use Cake\Database\Expression\FunctionExpression;
use Cake\Database\Type as BaseType;
use Cake\Database\Type\ExpressionTypeInterface;

class PointType extends BaseType implements ExpressionTypeInterface {
public function toPHP($value, Driver $d) {
return Point::parse($value);
}
public function marshal($value) {
if (is_string($value)) {
$value = explode(’,’, $value);
}
if (is_array($value)) {
return new Point($value[0], $value[1]);
}
return null;
}
public function toExpression($value) {
if ($value instanceof Point) {
return new FunctionExpression(
‘POINT’,
$value->lat(),
$value->long()
);
}
if (is_array($value)) {
return new FunctionExpression(‘POINT’, $value[0], $value[1]);
}
// Handle other cases.
}
}
?>

Then I added this line to config/bootstrap.php:

Type::map(‘point’, ‘App\Database\Type\PointType’);

and this line to src/Model/Table/ForecastsTable.php:

use Cake\Database\Schema\Table as Schema;

protected function _initializeSchema(Schema $schema) {
$schema->columnType(‘location’, ‘point’);
return $schema;
}

where location is the name of the column in my MySQL table Forecasts which holds POINT type geo values with a spatial index.
If I access the website from any page, I get this Fatal Error twice:

Fatal error: Class ‘App\Database\Type\PointType’ not found in C:\xampp\htdocs\forecast_clash\vendor\cakephp\cakephp\src\Database\Type.php on line 106

Here is the function called in Type.php with line 106 *'d

public static function build($name) {
    if (isset(static::$_builtTypes[$name])) {
        return static::$_builtTypes[$name];
    }
    if (!isset(static::$_types[$name])) {
        throw new InvalidArgumentException(sprintf('Unknown type "%s"', $name));
    }
    if (is_string(static::$_types[$name])) {
       **return static::$_builtTypes[$name] = new static::$_types[$name]($name);**
    }

    return static::$_builtTypes[$name] = static::$_types[$name];
}

I am new to CakePHP and am really struggling to decipher the errors and figure out where I went wrong. Any help is appreciated!

I needed to add my files to Database and Type folders I created in my app/src rather than in the vendor folder. I also needed to add the line

use Cake\Database\Driver;

to PointType.php