`<scopesym> { static if (<condition>) { <decl> } else { <elsedecl> } }`
Different from other AttribDeclaration subclasses, include() call requires the completion of addMember and setScope phases.
enclosing symbol (e.g. module) where symbols will be inserted
condition deciding whether decl or elsedecl applies
array of Dsymbol's for else block
See Implementation
`<scopesym> { static if (<condition>) { <decl> } else { <elsedecl> } }`