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function get_block_templates( $query = array(), $template_type = 'wp_template' ) {
  
/**
 * Filters the block templates array before the query takes place.
 *
 * Return a non-null value to bypass the WordPress queries.
 *
 * @since 5.9.0
 *
 * @param WP_Block_Template[]|null $block_templates Return an array of block templates to short-circuit the default query,
 *                                                  or null to allow WP to run it's normal queries.
 * @param array  $query {
 *     Optional. Arguments to retrieve templates.
 *
 *     @type array  $slug__in List of slugs to include.
 *     @type int    $wp_id Post ID of customized template.
 *     @type string $post_type Post type to get the templates for.
 * }
 * @param string $template_type wp_template or wp_template_part.
 */
  $templates = apply_filters( 'pre_get_block_templates', null, $query, $template_type );
  if ( ! is_null( $templates ) ) {
    return $templates;
  }

  $post_type     = isset( $query['post_type'] ) ? $query['post_type'] : '';
  $wp_query_args = array(
    'post_status'    => array( 'auto-draft', 'draft', 'publish' ),
    'post_type'      => $template_type,
    'posts_per_page' => -1,
    'no_found_rows'  => true,
    'tax_query'      => array(
      array(
        'taxonomy' => 'wp_theme',
        'field'    => 'name',
        'terms'    => get_stylesheet(),
      ),
    ),
  );

  if ( 'wp_template_part' === $template_type && isset( $query['area'] ) ) {
    $wp_query_args['tax_query'][]           = array(
      'taxonomy' => 'wp_template_part_area',
      'field'    => 'name',
      'terms'    => $query['area'],
    );
    $wp_query_args['tax_query']['relation'] = 'AND';
  }

  if ( isset( $query['slug__in'] ) ) {
    $wp_query_args['post_name__in'] = $query['slug__in'];
  }

  // This is only needed for the regular templates/template parts post type listing and editor.
  if ( isset( $query['wp_id'] ) ) {
    $wp_query_args['p'] = $query['wp_id'];
  } else {
    $wp_query_args['post_status'] = 'publish';
  }

  $template_query = new WP_Query( $wp_query_args );
  $query_result   = array();
  foreach ( $template_query->posts as $post ) {
    $template = _build_block_template_result_from_post( $post );

    if ( is_wp_error( $template ) ) {
      continue;
    }

    if ( $post_type && ! $template->is_custom ) {
      continue;
    }

    if (
      $post_type &&
      isset( $template->post_types ) &&
      ! in_array( $post_type, $template->post_types, true )
    ) {
      continue;
    }

    $query_result[] = $template;
  }

  if ( ! isset( $query['wp_id'] ) ) {
    $template_files = _get_block_templates_files( $template_type );
    foreach ( $template_files as $template_file ) {
      $template = _build_block_template_result_from_file( $template_file, $template_type );

      if ( $post_type && ! $template->is_custom ) {
        continue;
      }

      if ( $post_type &&
        isset( $template->post_types ) &&
        ! in_array( $post_type, $template->post_types, true )
      ) {
        continue;
      }

      $is_not_custom   = false === array_search(
        get_stylesheet() . '//' . $template_file['slug'],
        wp_list_pluck( $query_result, 'id' ),
        true
      );
      $fits_slug_query =
        ! isset( $query['slug__in'] ) || in_array( $template_file['slug'], $query['slug__in'], true );
      $fits_area_query =
        ! isset( $query['area'] ) || $template_file['area'] === $query['area'];
      $should_include  = $is_not_custom && $fits_slug_query && $fits_area_query;
      if ( $should_include ) {
        $query_result[] = $template;
      }
    }
  }

  
/**
 * Filters the array of queried block templates array after they've been fetched.
 *
 * @since 5.9.0
 *
 * @param WP_Block_Template[] $query_result Array of found block templates.
 * @param array  $query {
 *     Optional. Arguments to retrieve templates.
 *
 *     @type array  $slug__in List of slugs to include.
 *     @type int    $wp_id Post ID of customized template.
 * }
 * @param string $template_type wp_template or wp_template_part.
 */
  return apply_filters( 'get_block_templates', $query_result, $query, $template_type );
}