code: public VariableInfo[] getVariableInfo(TagData pData) {
          // Get attribute name
          String attributeName = pData.getId();
          if (attributeName == null) {
              attributeName = IteratorProviderTag.getDefaultIteratorName();
          }
  
          // Get type
          String type = pData.getAttributeString(IteratorProviderTag.ATTRIBUTE_TYPE);
          if (type == null) {
              type = IteratorProviderTag.getDefaultIteratorType();
          }
  
          // Return the variable info
          return new VariableInfo[]{
              new VariableInfo(attributeName, type, true, VariableInfo.AT_END),
          };
      }
docs: Gets the variable info for IteratorProvider tags. The attribute with the
  name defined by the "id" attribute and type defined by the "type"
  attribute is declared with scope {@code VariableInfo.AT_END}.
  
  @param pData TagData instance provided by container
  @return an VariableInfo array of lenght 1, containing the attribute
  defined by the id parameter, declared, and with scope
  {@code VariableInfo.AT_END}.