function Range(startLineNumber, startColumn, endLineNumber, endColumn) {
            if ((startLineNumber > endLineNumber) || (startLineNumber === endLineNumber && startColumn > endColumn)) {
                this.startLineNumber = endLineNumber;
                this.startColumn = endColumn;
                this.endLineNumber = startLineNumber;
                this.endColumn = startColumn;
            }
            else {
                this.startLineNumber = startLineNumber;
                this.startColumn = startColumn;
                this.endLineNumber = endLineNumber;
                this.endColumn = endColumn;
            }
        }
A range in the editor. (startLineNumber,startColumn) is <= (endLineNumber,endColumn)