src/admin/class-papi-admin-meta-box.php
protected function get_post_type() {
		if ( papi_get_meta_type() === 'post' ) {
			if ( $post_id = papi_get_post_id() ) {
				return get_post_type( $post_id );
			}

			if ( $post_type = papi_get_post_type() ) {
				return $post_type;
			}
		}

		return $this->box->id;
	}
protected function get_post_type() {
		if ( papi_get_meta_type() === 'post' ) {
			if ( $post_id = papi_get_post_id() ) {
				return get_post_type( $post_id );
			}

			if ( $post_type = papi_get_post_type() ) {
				return $post_type;
			}
		}

		return $this->box->id;
	}
Get meta post type.

@return string