Mayya Sharipova 70e63a365a
Refactor how to determine if a field is metafield () ()
Before to determine if a field is meta-field, a static method of MapperService
isMetadataField was used. This method was using an outdated static list
of meta-fields.

This PR instead changes this method to the instance method that
is also aware of meta-fields in all registered plugins.

Related , 
Closes 
2020-06-08 09:16:18 -04:00
..