parseGeometryLayout_() {
    /** @type {import("../geom/Geometry.js").GeometryLayout} */
    let layout = 'XY';
    const dimToken = this.token_;
    if (this.isTokenType(TokenType.TEXT)) {
      const dimInfo = dimToken.value;
      if (dimInfo === Z) {
        layout = 'XYZ';
      } else if (dimInfo === M) {
        layout = 'XYM';
      } else if (dimInfo === ZM) {
        layout = 'XYZM';
      }
      if (layout !== 'XY') {
        this.consume_();
      }
    }
    return layout;
  }
Try to parse the dimensional info.
@return {import("../geom/Geometry.js").GeometryLayout} The layout.
@private