private function is_preview_email_improvements_enabled( string $feature_id ): bool {

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if ( 'email_improvements' !== $feature_id ) {

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return false;

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}

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/**

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* This filter is documented in templates/emails/email-styles.php

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*

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* @since 9.9.0

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* @param bool $is_email_preview Whether the email is being previewed.

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*/

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$is_email_preview = apply_filters( 'woocommerce_is_email_preview', false );

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if ( $is_email_preview ) {

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return get_transient( EmailPreview::TRANSIENT_PREVIEW_EMAIL_IMPROVEMENTS ) === 'yes';

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}

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return false;

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}

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}

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[2017] Fix | Delete