public function save( $sync = true ) {
		$ids = $this->get_ids();

		if ( empty( $ids ) ) {
			return array();
		}

		$exit     = array();
		$postarrs = array();

		foreach ( $ids as $id ) {
			$postarr = array(
				'ID'         => $id,
				'tax_input'  => array(),
				'meta_input' => array(),
			);

			foreach ( $this->updates as $key => $value ) {
				if ( is_callable( $value ) ) {
					$value = $value( $id, $key, $this );
				}

				if ( ! $this->can_be_udpated( $key ) ) {
					throw Tribe__Repository__Usage_Error::because_this_field_cannot_be_updated( $key, $this );
				}

				if ( $this->is_a_post_field( $key ) ) {
					if ( $this->requires_converted_date( $key ) ) {
						$this->update_postarr_dates( $key, $value, $postarr );
					} else {
						$postarr[ $key ] = $value;
					}
				} elseif ( $this->is_a_taxonomy( $key ) ) {
					$postarr['tax_input'][ $key ] = $value;
				} else {
					// it's a custom field
					$postarr['meta_input'][ $key ] = $value;
				}
			}

			$postarrs[ $id ] = $postarr;
		}

		// @todo actually implement async

		foreach ( $postarrs as $id => $postarr ) {
			$this_exit   = wp_update_post( $postarr );
			$exit[ $id ] = $id === $this_exit ? true : $this_exit;
		}

		return $exit;
	}