code: public Collection<String> getTrimmedStringCollection(String name) {
          String valueString = get(name);
          if (null == valueString) {
              return Collections.emptyList();
          }
          return Arrays.asList(StringUtils.stripAll(StringUtils.split(valueString, ",")));
      }
docs: Get the comma delimited values of the <code>name</code> property as
  a collection of <code>String</code>s, trimmed of the leading and trailing whitespace.
  If no such property is specified then empty <code>Collection</code> is returned.
  
  @param name property name.
  @return property value as a collection of <code>String</code>s, or empty <code>Collection</code>