MFEMProblemComposer
Overview
MFEMProblemComposer is the base class of those classes that build ProblemOperator objects, through the method createProblemOperator(). The composer itself is created by the MFEMProblem.
These composer objects can be used to instantiate the provided equation system problem operators, or user defined custom ones. For example usage on custom operators refer to the walkthrough example in this page.