Gets the value of the specified field.
!(p)
This will return the value for the specified field.
@param field the field to find, not null
@return the value, null if not found and optional is true
@throws DateTimeException if the field is not available and the section is not optional
Gets the value of the specified field. !(p) This will return the value for the specified field.
@param field the field to find, not null @return the value, null if not found and optional is true @throws DateTimeException if the field is not available and the section is not optional