setCategory method
- String? val
 
Sets the aps.category field.
val: A string to be used for theaps.categoryfield value, or nil to clear it.
Implementation
ApnsMpnBuilder setCategory(String? val) {
  _category = val;
  return this;
}
Sets the aps.category field.
val: A string to be used for the aps.category field value, or nil to clear it.ApnsMpnBuilder setCategory(String? val) {
  _category = val;
  return this;
}