class_docstr: For use within the 'within_subsection_order' key.
class_docstr_tok: ["For","use","within","the","'within_subsection_order","'","key","."]
code: def __init__(self, src_dir):
      self.src_dir = src_dir  # src_dir is unused here
      self.ordered_list = explicit_subsection_order
  
imports: from sphinx_gallery.sorting import ExplicitOrder
label_desc: Use image node_id 1 to create a new MplExplicitSubOrder object  with example: obj = MplExplicitSubOrder(src_dir)