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wp-content/plugins/wordpress-seo/inc/class-wpseo-features.php

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+<?php
+/**
+ * WPSEO plugin file.
+ *
+ * @package WPSEO\Internal
+ */
+
+/**
+ * Class containing method for WPSEO Features.
+ *
+ * @deprecated 16.0
+ */
+class WPSEO_Features {
+
+	/**
+	 * Checks if the premium constant exists to make sure if plugin is the premium one.
+	 *
+	 * @deprecated 16.0
+	 * @codeCoverageIgnore
+	 *
+	 * @return bool
+	 */
+	public function is_premium() {
+		_deprecated_function( __FUNCTION__, '16.0', 'YoastSEO()->helpers->product->is_premium' );
+		return YoastSEO()->helpers->product->is_premium();
+	}
+
+	/**
+	 * Checks if using the free version of the plugin.
+	 *
+	 * @deprecated 16.0
+	 * @codeCoverageIgnore
+	 *
+	 * @return bool
+	 */
+	public function is_free() {
+		_deprecated_function( __FUNCTION__, '16.0', 'YoastSEO()->helpers->product->is_premium' );
+		return true;
+	}
+}