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wp-content/plugins/jetpack-boost/compatibility/breakdance.php

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+<?php
+/**
+ * Compatibility for Breakdance
+ *
+ * @package automattic/jetpack-boost
+ */
+
+namespace Automattic\Jetpack_Boost\Compatibility\Breakdance;
+
+/**
+ * Exclude Breakdance custom post types from list of posts to generate critical CSS for.
+ *
+ * @param array $post_types Post types.
+ */
+function exclude_breakdance_custom_post_types( $post_types ) {
+	if ( defined( 'BREAKDANCE_ALL_EDITABLE_POST_TYPES' ) ) {
+		foreach ( BREAKDANCE_ALL_EDITABLE_POST_TYPES as $post_type ) {
+			unset( $post_types[ $post_type ] );
+		}
+	}
+
+	return $post_types;
+}
+
+add_filter( 'jetpack_boost_critical_css_post_types_singular', __NAMESPACE__ . '\exclude_breakdance_custom_post_types' );
+add_filter( 'jetpack_boost_critical_css_post_types_archives', __NAMESPACE__ . '\exclude_breakdance_custom_post_types' );