A bifilair wound ferrite coil is essentially just a 1:1 transformer. Depending on the application and the type of ferrite used in the construction it may be used as a transformer or a common mode choke but the symbol for it would be the same as any 2 winding 1:1 transformer. You could then edit the part attributes to suit the part number, supplier and package (i.e. PCB Footprint) as described in (2.3) in (2) in: [https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a](https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a)