cdm/src/main/java/ucar/nc2/ft/point/standard/Evaluator.java
static public String getDimensionName(NetcdfDataset ds, String key, Formatter errlog) {
    Dimension d = getDimension(ds, key, errlog);
    return (d == null) ? null : d.getShortName();
  }
static public String getDimensionName(NetcdfDataset ds, String key, Formatter errlog) {
    Dimension d = getDimension(ds, key, errlog);
    return (d == null) ? null : d.getShortName();
  }
Find the dimension pointed to by key

@param ds     in this dataset
@param key    may be dimension name or ":gatt" where gatt is local attribute whose value is the dimension name
@param errlog error messages here
@return name of dimension or null if not exist