code: def add_limbs(self, key=None):
          ''' Add a new section from the tree into the existing os environment
  
          Parameters:
              key (str):
                  The section name to grab from the environment
  
          '''
          self.branch_out(limb=key)
          self.add_paths_to_os(key=keyf add_limbs(self, key=None):
          ''' Add a new section from the tree into the existing os environment
  
          Parameters:
              key (str):
                  The section name to grab from the environment
  
          '''
          self.branch_out(limb=key)
          self.add_paths_to_os(key=key)
docs: Add a new section from the tree into the existing os environment
  
          Parameters:
              key (str):
                  The section name to grab from the environment