init method
Implementation
void init({ComToastTheme? theme}) {
theme?.toast.base?.validate();
theme?.toast.normal?.validate();
theme?.toast.success?.validate();
theme?.toast.error?.validate();
theme?.toast.warning?.validate();
theme?.toast.info?.validate();
theme?.banner.base?.validate();
theme?.banner.normal?.validate();
theme?.banner.success?.validate();
theme?.banner.error?.validate();
theme?.banner.warning?.validate();
theme?.banner.info?.validate();
theme?.loading?.validate();
_theme = theme;
}