i want to clear dropdown field after chosing it, i don’t seem to find controller or similar.

i am using animated custom dropdown package https://pub.dev/packages/animated_custom_dropdown

Container(
                      height: 60,
                      decoration: BoxDecoration(
                          border: Border.all(
                            color: const Color.fromRGBO(238, 240, 243, 1),
                          ),
                          borderRadius: BorderRadius.circular(10)),
                      child: CustomDropdown(
                        hideSelectedFieldWhenExpanded: true,
                        hintText: 'Category',
                        decoration: CustomDropdownDecoration(
                            hintStyle: GoogleFonts.poppins(
                          color: Colors.black,
                        )),
                        items: categories,
                        onChanged: (value) {
                          print(value);
                        },
                      ),
                    ),
                    const SizedBox(height: 20),
                    Container(
                      height: 60,
                      decoration: BoxDecoration(
                          border: Border.all(
                            color: const Color.fromRGBO(238, 240, 243, 1),
                          ),
                          borderRadius: BorderRadius.circular(10)),
                      child: Center(
                          child: CustomDropdown.multiSelect(
                        hintText: 'Sub Category',
                        items: subCategories,
                        decoration: CustomDropdownDecoration(
                            hintStyle: GoogleFonts.poppins(
                          color: Colors.black,
                        )),
                        onListChanged: (value) {
                          print(value);
                        },
                      )),
                    ),

how can i clear selection after selecting multiple sub categories.