class_docstr: A node object.
class_docstr_tok: ["A","node","object","."]
docstr: Check if the node is a leaf.
docstr_tok: ["Check","if","the","node","is","a","leaf","."]
code: def is_leaf(self):
      """Check if the node is a leaf."""
      return not self.children
  
imports: from satpy.utils import get_logger
label_desc: Use image node_id 3 for calling the Node obj's underlying member method code with example usage: obj.is_leaf() and returns: unknown