/**
 * @callback Phaser.Types.GameObjects.Particles.DeathZoneSourceCallback
 * @since 3.0.0
 *
 * @param {number} x - The x coordinate of the particle to check against this source area.
 * @param {number} y - The y coordinate of the particle to check against this source area.
 *
 * @return {boolean} - True if the coordinates are within the source area.
 */
