CQisLayer

DataType: CQisLayer

Use:
	Represents a GDSII/OASIS layer.

Members:
	Layer : layer number.
	DataType: datatype or texttype number.

Notes:
	- If DataType is -1, it is equivalent to ignoring the datatype/ texttype for that
	particular layer. Hence, it represents all datatypes/texttypes for that particular
	layer.
	- This is used in function calls where the user can specify an operation on a
	particular layer and datatype/texttype combination or the entire layer irrespective
	of the datatype/texttype.
	- Refer to the 'SUPPORT & COMPLIANCE' section to learn about maximum layer and
	datatype/texttype numbers.