text: /** @format */
  //******************************************************************************
  // Exercise Id Reducer
  // Matching Function(s) in src/actions/index.js:
  // setExerciseId(exerciseId)
  //
  export default function(state = null, action) {
      switch (action.type) {
        case 'EXID_CHANGED':
          return action.payload
      }
      return state
    }