DEMIGroup-class: Class 'DEMIGroup'
In demi: Differential Expression from Multiple Indicators

The class DEMIGroup holds the information about the groups. Such as the column indexes of both groups and names of the groups.

`groupA`	A `character`. Holds the name of group A.
`groupB`	A `character`. Holds the name of group B.
`indexA`	A `numeric`. A vector of column indexes belonging to group A.
`indexB`	A `numeric`. A vector of column indexes belonging to group B.
`groupNames`	A `character`. Holds the names of custom groups created by the user.