Attempts to find an InfoElement that matches this field specifier in the given Template and returns its position as an Option.
The optional Identifier of the element.
The optional name of the element.
The occurrence of element to return; the first occurrence is 1.
A FieldSpec is used to locate an InfoElement within an existing Template.
IEFieldSpecifier if you are attempting to include an Information Element in new a Template.
The companion object for more details