code: def decrease_indent(self):
      if self.on() and len(self.indent_) > 4:
          self.indent_ = self.indent_[-4:]
  
file_path: turicreate/src/external/boost/boost_1_68_0/tools/build/src/util/logger.py
imports: import sys
label_desc: Use image node_id 4 for calling the NullLogger obj's underlying member method code with example usage: obj.decrease_indent() without return types