ExpressionV2Type type
Type of expressions supported by the system. Type: string.
KnownExpressionV2Type can be used interchangeably with ExpressionV2Type,
this enum contains the known values that the service supports.
Known values supported by the service
Constant: Constant
Field: Field
Unary: Unary
Binary: Binary
NAry: NAry
type ExpressionV2Type = string