private static String makeImportedNestedFieldName(TemporaryImportedField importedField, ImmutableSDField targetNestedField) {
        return importedField.fieldName() + targetNestedField.getName().substring(importedField.targetFieldName().length());
    }
Iterates all imported fields from schema parsing and validates and resolves them into concrete fields from referenced document types.

@author geirst
config-model/src/main/java/com/yahoo/schema/processing/ImportedFieldsResolver.java