Base:
method
AdjustAndAddAppropriateDeclaratorsToRemove
Microsoft.CodeAnalysis.RemoveUnusedMembers.AbstractRemoveUnusedMembersCodeFixProvider<TFieldDeclarationSyntax>.AdjustAndAddAppropriateDeclaratorsToRemove(System.Collections.Generic.HashSet<TFieldDeclarationSyntax>, System.Collections.Generic.HashSet<Microsoft.CodeAnalysis.SyntaxNode>)