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// Disable Gutenberg Editor
if ( version_compare( $GLOBALS['wp_version'], '5.0-beta', '>' ) ) {
	// WP > 5 beta
	add_filter( 'use_block_editor_for_post_type', '__return_false', 100 );
} else {
	// WP < 5 beta
	add_filter( 'gutenberg_can_edit_post_type', '__return_false' );
}