How to use the @redux-saga/core/effects.effectTypes.GET_CONTEXT function in @redux-saga/core

.addEffectType("actionChannel")
        .resetStyle()
        .addValue(payload.buffer == null ? payload.pattern : payload)
        .addDescResult(desc);
    } else if (type === effectTypes.CANCELLED) {
      formatter
        .addEffectType("cancelled")
        .resetStyle()
        .addDescResult(desc);
    } else if (type === effectTypes.FLUSH) {
      formatter
        .addEffectType("flush")
        .resetStyle()
        .addValue(payload)
        .addDescResult(desc);
    } else if (type === effectTypes.GET_CONTEXT) {
      formatter
        .addEffectType("getContext")
        .resetStyle()
        .addValue(payload)
        .addDescResult(desc);
    } else if (type === effectTypes.SET_CONTEXT) {
      formatter
        .addEffectType("setContext")
        .resetStyle()
        .addValue(payload)
        .addDescResult(desc, true);
    } else {
      throw new Error(`Invalid effect type ${type}`);
    }
  } else {
    formatter