visad/src/main/java/ucar/nc2/iosp/mcidas/McIDASLookup.java
public boolean isLayer(GridRecord gr) {
    if (cust != null) {
      return cust.isLayer( gr.getLevelType1());
    }

    if (gr.getLevel2() == 0) {
      return false;
    }
    return true;
  }
public boolean isLayer(GridRecord gr) {
    if (cust != null) {
      return cust.isLayer( gr.getLevelType1());
    }

    if (gr.getLevel2() == 0) {
      return false;
    }
    return true;
  }
Is this a layer?

@param gr record to check
@return true if a layer