SdbIndex4RefExtension<K extends SdbKey, V extends SdbValue, I1 extends SdbIndexKey, I2 extends SdbIndexKey, I3 extends SdbIndexKey, I4 extends SdbIndexKey>  extension 
 
Extension on index on 4 fields.
- on
 - 
          
- SdbIndex4Ref<
K, V, I1, I2, I3, I4>  
 - SdbIndex4Ref<
 
Methods
- 
  lowerBoundary(
I1 value1, I2 value2, I3 value3, I4 value4, {bool? include = true}) → SdbBoundary< (I1, I2, I3, I4)>  - 
      
Available on SdbIndex4Ref<
Lower boundaryK, V, I1, I2, I3, I4> , provided by the SdbIndex4RefExtension extension - 
  upperBoundary(
I1 value1, I2 value2, I3 value3, I4 value4, {bool? include = false}) → SdbBoundary< (I1, I2, I3, I4)>  - 
      
Available on SdbIndex4Ref<
Upper boundaryK, V, I1, I2, I3, I4> , provided by the SdbIndex4RefExtension extension