code: @SuppressFBWarnings ({ "ES_COMPARING_PARAMETER_STRING_WITH_EQ" })
    public static boolean equalsIgnoreCase (@Nullable final String sObj1, @Nullable final String sObj2)
    {
      return sObj1 == null ? sObj2 == null : sObj1.equalsIgnoreCase (sObj2);
    }
docs: Check if the passed strings are equals case insensitive handling
  <code>null</code> appropriately.
  
  @param sObj1
  First object to compare
  @param sObj2
  Second object to compare
  @return <code>true</code> if they are equal case insensitive,
  <code>false</code> otherwise.