text: public long ramBytesUsed() {long ramBytesUsed = BASE_RAM_BYTES_USED;ramBytesUsed += fields.size() * 2L * RamUsageEstimator.NUM_BYTES_OBJECT_REF;ramBytesUsed += formats.size() * 2L * RamUsageEstimator.NUM_BYTES_OBJECT_REF;for(Map.Entry<String,FieldsProducer> entry: formats.entrySet()) {ramBytesUsed += entry.getValue().ramBytesUsed();}return ramBytesUsed;}