code: def solve(self, id_, packages, python, platform):
      # Performance enhancements
      # 1. Using zstd compressed repodata index files drops the index download time
      #    by a factor of 10x - conda-forge/noarch/repodata.json has a
      #    mean download time of 3.705s ± 2.283s vs 385.1ms ± 57.9ms for
      #    conda-forge/noarch/repodata.json.zst. Thankfully, now micromamba pulls
      #    zstd compressed files by default - https://github.com/conda-forge/conda-forge.github.io/issues/1835
      # 2. Tweak repodata ttl to pull either only once a day or if a solve fails -
      #    this ensures that repodata is not pulled everytime it becomes dirty by
      #    default. This can result in an environment that has stale transitive
      #    dependencies but still correct. (--repodata-ttl 86400 --retry-clean-cache)
      # 3. Introduce pip as python dependency to resolve pip packages within conda
      #    environment
      # 4. Multiple solves can progress at the same time while relying on the same
      #    index
      with tempfile.TemporaryDirectory() as tmp_dir:
          env = {
              "MAMBA_ADD_PIP_AS_PYTHON_DEPENDENCY": "true",
              "CONDA_SUBDIR": platform,
              # "CONDA_UNSATISFIABLE_HINTS_CHECK_DEPTH": "0" # https://github.com/conda/conda/issues/9862
          }
          cmd = [
              "create",
              "--yes",
              "--quiet",
              "--dry-run",
              "--no-extra-safety-checks",
              "--repodata-ttl=86400",
              "--retry-clean-cache",
              "--prefix=%s/prefix" % tmp_dir,
          ]
          # Introduce conda-forge as a default channel
          for channel in self.info()["channels"] or ["conda-forge"]:
              cmd.append("--channel=%s" % channel)
  
          for package, version in packages.items():
              cmd.append("%s==%s" % (package, version))
          if python:
              cmd.append("python==%s" % python)
          # TODO: Ensure a human readable message is returned when the environment
          #       can't be resolved for any and all reasons.
          return [
              {k: v for k, v in item.items() if k in ["url"]}
              for item in self._call(cmd, env)["actions"]["LINK"]
          ]
  
imports: import json
  import os
  import subprocess
  import tempfile
  from metaflow.exception import MetaflowException
  from metaflow.util import which
  from .utils import conda_platform
label_desc: Use image node_id 2 for calling the Micromamba obj's underlying member method code with example usage: obj.solve(id_, packages, python, platform) and returns: unknown