code: def reset_indent(token_class):
          
          def callback(lexer, match, context):
              text = match.group()
              context.indent_stack = []
              context.indent = -1
              context.next_indent = 0
              context.block_scalar_indent = None
              yield match.start(), token_class, text
              context.pos = match.end()
          return callback
docs: Reset the indentation levels.