class_docstr: Structure to discover and store `Dataset` dependencies.
  
  Used primarily by the `Scene` object to organize dependency finding.
  Dependencies are stored used a series of `Node` objects which this
  class is a subclass of.
class_docstr_tok: ["Structure","to","discover","and","store","`","Dataset","`","dependencies",".","Used","primarily","by","the","`","Scene","`","object","to","organize","dependency","finding",".","Dependencies","are","stored","used","a","series","of","`","Node","`","objects","which","this","class","is","a","subclass","of","."]
code: def _create_subtree_from_compositors(self, dataset_key, query):
      try:
          node = self._find_compositor(dataset_key, query)
          LOG.trace(
              "Found composite:\n\tRequested: {}\n\tFound: {}".format(
                  dataset_key, node and node.name
              )
          )
      except KeyError:
          LOG.trace("Composite not found: {}".format(dataset_key))
          raise MissingDependencies({dataset_key})
      return node
  
imports: from __future__ import annotations
  from typing import Container, Iterable, Optional
  import numpy
  from satpy import DataID, DatasetDict
  from satpy.dataset import ModifierTuple, create_filtered_query
  from satpy.dataset.data_dict import TooManyResults, get_key
  from satpy.node import EMPTY_LEAF_NAME, LOG, CompositorNode, MissingDependencies, Node, ReaderNode
label_desc: Use image node_id 15 for calling the DependencyTree obj's underlying member method code with example usage: obj._create_subtree_from_compositors(dataset_key, query) and returns: node