question: public void addEntityVariable ( String variableName , JpqlEntityModel entity ) { if ( variableName == null ) { throw new NullPointerException ( "No entity variable name passed" ) ; } if ( entity == null ) { throw new NullPointerException ( "No entity passed" ) ; } if ( entityVariableName2entity . containsKey ( variableName ) ) throw new IllegalArgumentException ( String . format ( "Trying to rebind variable [%s]" , variableName ) ) ; entityVariableName2entity . put ( variableName , entity ) ; }
target:  Internal method to register entity variables found in query