Defines the {@link org.eclipse.gmf.runtime.emf.core.internal.services.metamodel.MetamodelSupportService} class that looks up {@link org.eclipse.gmf.runtime.emf.core.services.metamodel.IMetamodelSupport}s by delegation to registered providers.
@see org.eclipse.gmf.runtime.emf.core.internal.util.MSLUtil#getMetaModel @canBeSeenBy org.eclipse.gmf.runtime.emf.core.*