code: public Schema field(String fieldName, TypeInformation<?> fieldType) {
  		field(fieldName, TypeStringUtils.writeTypeInfo(fieldType));
  		return this;
  	}
docs: Adds a field with the field name and the type information. Required.
  This method can be called multiple times. The call order of this method defines
  also the order of the fields in a row.
  
  @param fieldName the field name
  @param fieldType the type information of the field