module.exports = {
  fromFirstMateScopeId (firstMateScopeId) {
    let atomScopeId = -firstMateScopeId
    if ((atomScopeId & 1) === 0) atomScopeId--
    return atomScopeId + 256
  },

  toFirstMateScopeId (atomScopeId) {
    return -(atomScopeId - 256)
  }
}