public FromClause(Stream streamOne,OuterJoinQualifier outerJoinQualifier,Stream streamTwo){
  this(streamOne);
  add(streamTwo);
  outerJoinQualifiers.add(outerJoinQualifier);
}

public FromClause ( Stream streamOne , OuterJoinQualifier outerJoinQualifier , Stream streamTwo ) { this ( streamOne ) ; add ( streamTwo ) ; outerJoinQualifiers . add ( outerJoinQualifier ) ; }
ctor for an outer join between two streams .
