code: public static MessageType getSchemaForRead(MessageType fileMessageType, MessageType projectedMessageType) {
      assertGroupsAreCompatible(fileMessageType, projectedMessageType);
      return projectedMessageType;
    }
docs: Updated method from ReadSupport which checks if the projection's compatible instead of a
  stricter check to see if the file's schema contains the projection
  
  @param fileMessageType
  @param projectedMessageType
  @return