cdm/src/main/java/ucar/nc2/dataset/CoordinateSystem.java
public ProjectionCT getProjectionCT() {
    for (CoordinateTransform ct : coordTrans) {
      if (ct instanceof ProjectionCT)
        return (ProjectionCT) ct;
    }
    return null;
  }
public ProjectionCT getProjectionCT() {
    for (CoordinateTransform ct : coordTrans) {
      if (ct instanceof ProjectionCT)
        return (ProjectionCT) ct;
    }
    return null;
  }
Find the first ProjectionCT from the list of CoordinateTransforms.
@return ProjectionCT or null if none.