old_contents: # Copyright (c) 2015. Mount Sinai School of Medicine
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  from .variant import Variant
  from .variant_collection import VariantCollection
  from .maf import load_maf, load_maf_dataframe
  from .vcf import load_vcf, load_vcf_fast
  from .effects import effect_priority, top_priority_effect, EffectCollection
  
  from ._version import get_versions
  __version__ = get_versions()['version']
  del get_versions
  
  
  __all__ = [
      # basic classes
      "Variant",
      "EffectCollection",
      "VariantCollection",
      # effects
      "effect_priority",
      "top_priority_effect",
      # file loading
      "load_maf",
      "load_maf_dataframe",
      "load_vcf",
      "load_vcf_fast",
  ]
  
new_contents: # Copyright (c) 2015. Mount Sinai School of Medicine
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  from .variant import Variant
  from .variant_collection import VariantCollection
  from .maf import load_maf, load_maf_dataframe
  from .vcf import load_vcf, load_vcf_fast
  from .effects import (
      effect_priority,
      top_priority_effect,
      EffectCollection,
      MutationEffect,
  )
  
  from ._version import get_versions
  __version__ = get_versions()['version']
  del get_versions
  
  __all__ = [
      # basic classes
      "Variant",
      "EffectCollection",
      "VariantCollection",
      # effects
      "effect_priority",
      "top_priority_effect",
      "MutationEffect",
      # file loading
      "load_maf",
      "load_maf_dataframe",
      "load_vcf",
      "load_vcf_fast",
  ]
  
subject: Add MutationEffect to __init__.py