class_docstr: A line-based string reader.
  
      
code: def seek_next_non_empty_line(self):
      for l in self[self._l :]:
          if l.strip():
              break
          else:
              self._l += 1
  
imports: import re
  import textwrap
  from warnings import warn
label_desc: Use image node_id 5 for calling the Reader obj's underlying member method code with example usage: obj.seek_next_non_empty_line() without return types