public Builder putEnviron(
        java.lang.String key,
        java.lang.String value) {
      if (key == null) { throw new NullPointerException("map key"); }
      if (value == null) { throw new NullPointerException("map value"); }
      internalGetMutableEnviron().getMutableMap()
          .put(key, value);
      bitField0_ |= 0x00000040;
      return this;
    }
public Builder putEnviron(
        java.lang.String key,
        java.lang.String value)