text: // @ts-check
  
  export class SourceSection {
    constructor(qualifier, startLine, startColumn, charIndex, length) {
      this.qualifier = qualifier;
      this._startLine = startLine;
      this._startColumn = startColumn;
      this._charIndex = charIndex;
      this._length = length;
    }
  
    startLine() { return this._startLine; }
  
    startColumn() { return this._startColumn; }
  
    charIndex() { return this._charIndex; }
  
    length() { return this._length; }
  }
  