Type aliases

RxGP defines several type aliases used throughout the message passing rules to constrain method signatures.

Alias	Union members	Used for
`IN_OUT`	`Real`, `Array{<:Number}`, `PointMass`, `UnivariateNormalDistributionsFamily`, `MultivariateNormalDistributionsFamily`	Input and output edge types
`NOISE_Wg`	`Wishart`, `PointMass`	Gradient noise precision
`NOISE_w`	`GammaShapeRate`, `PointMass`	Scalar noise precision
`TYPE_Norm`	`UnivariateNormalDistributionsFamily`, `MultivariateNormalDistributionsFamily`	Any normal distribution
`TYPE_ContLogPdf`	`ContinuousUnivariateLogPdf`, `ContinuousMultivariateLogPdf`	Log-pdf message types

These aliases are not exported but are used internally to dispatch the correct message passing rules.