`sig val mk : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.module_expr_desc -> Parsetree.module_expr val attr : Parsetree.module_expr -> Parsetree.attribute -> Parsetree.module_expr val ident : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Ast_helper.lid -> Parsetree.module_expr val structure : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.structure -> Parsetree.module_expr val functor_ : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Ast_helper.str -> Parsetree.module_type option -> Parsetree.module_expr -> Parsetree.module_expr val apply : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.module_expr -> Parsetree.module_expr -> Parsetree.module_expr val constraint_ : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.module_expr -> Parsetree.module_type -> Parsetree.module_expr val unpack : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.expression -> Parsetree.module_expr val extension : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.extension -> Parsetree.module_expr end`