cdm/src/main/java/ucar/ma2/StructureData.java
public Array getArray(String memberName) {
    StructureMembers.Member m = members.findMember(memberName);
    if (m == null)
      throw new IllegalArgumentException("illegal member name =" + memberName);
    return getArray(m);
  }
public Array getArray(String memberName) {
    StructureMembers.Member m = members.findMember(memberName);
    if (m == null)
      throw new IllegalArgumentException("illegal member name =" + memberName);
    return getArray(m);
  }
Get  member data array of any type as an Array.
For more efficiency, use getScalarXXX(Member) or getJavaArrayXXX(Member) is possible.
@param memberName name of member Variable.
@return member data array of any type as an Array.
@throws IllegalArgumentException if name is not legal member name.