部分接口暂未开发 #5
Description
Feature Request
1、接口名称：setFlushOnBackground
原库描述：This allows enabling or disabling whether or not Mixpanel flushes events when the app enters the background on iOS.
2、接口名称：trackWithGroups
原库描述：Track an event with specific groups.
3、接口名称：setGroup
原库描述：Set the group this user belongs to.
4、接口名称：addGroup
原库描述：Add a group to this user's membership for a particular group key
5、接口名称：removeGroup
原库描述：Remove a group from this user's membership for a particular group key
6、接口名称：deleteGroup
原库描述：Permanently deletes this group's record from Group Analytics.
7、接口名称：groupSetProperties
原库描述：Sets a single property with the given name and value for this group.
8、接口名称：groupSetPropertyOnce
原库描述：Works just like groupSet() except it will not overwrite existing property values.
9、接口名称：groupUnsetProperty
原库描述：Permanently removes the property with the given name from the group's profile
10、接口名称：groupRemovePropertyValue
原库描述：Remove value from a list-valued property only if it is already present in the list.
11、接口名称：groupUnionProperty
原库描述：Adds values to a list-valued property only if they are not already present in the list.
Why it is needed
该部分接口暂未开发
Possible implementation
该部分接口暂未开发