public function positive_int() {
			if ( preg_match( '/^[0-9]+$/', $this->value ) && $this->value > 0 ) {
				$this->result->valid = true;
			} else {
				$this->result->valid = false;
				$this->result->error = sprintf( esc_html__( '%s must be a positive number.', 'tribe-common' ), $this->label );
			}
		}