def _setAdditionalTransformBone(prop, value):
    arm = prop.id_data
    prop['is_additional_transform_dirty'] = True
    if arm.pose.bones.keys() not in value:
        prop['additional_transform_bone_id'] = -1
        return
    pose_bone = arm.pose.bones[value]
    bone = FnBone(pose_bone)
    prop['additional_transform_bone_id'] = bone.bone_id
dataset/ETHPy150Open sugiany/blender_mmd_tools/mmd_tools/properties/bone.py/_setAdditionalTransformBone/swapped operands of `not in`