Class type fields

`val mk : ?⁠loc:loc ‑> ?⁠attrs:attrs ‑> ?⁠docs:Docstrings.docs ‑> Ppxlib_ast__.Import.Parsetree.class_type_field_desc ‑> Ppxlib_ast__.Import.Parsetree.class_type_field`
`val attr : Ppxlib_ast__.Import.Parsetree.class_type_field ‑> Ppxlib_ast__.Import.Parsetree.attribute ‑> Ppxlib_ast__.Import.Parsetree.class_type_field`
`val inherit_ : ?⁠loc:loc ‑> ?⁠attrs:attrs ‑> Ppxlib_ast__.Import.Parsetree.class_type ‑> Ppxlib_ast__.Import.Parsetree.class_type_field`
`val val_ : ?⁠loc:loc ‑> ?⁠attrs:attrs ‑> str ‑> Ppxlib_ast__.Import.Asttypes.mutable_flag ‑> Ppxlib_ast__.Import.Asttypes.virtual_flag ‑> Ppxlib_ast__.Import.Parsetree.core_type ‑> Ppxlib_ast__.Import.Parsetree.class_type_field`
`val method_ : ?⁠loc:loc ‑> ?⁠attrs:attrs ‑> str ‑> Ppxlib_ast__.Import.Asttypes.private_flag ‑> Ppxlib_ast__.Import.Asttypes.virtual_flag ‑> Ppxlib_ast__.Import.Parsetree.core_type ‑> Ppxlib_ast__.Import.Parsetree.class_type_field`
`val constraint_ : ?⁠loc:loc ‑> ?⁠attrs:attrs ‑> Ppxlib_ast__.Import.Parsetree.core_type ‑> Ppxlib_ast__.Import.Parsetree.core_type ‑> Ppxlib_ast__.Import.Parsetree.class_type_field`
`val extension : ?⁠loc:loc ‑> ?⁠attrs:attrs ‑> Ppxlib_ast__.Import.Parsetree.extension ‑> Ppxlib_ast__.Import.Parsetree.class_type_field`
`val attribute : ?⁠loc:loc ‑> Ppxlib_ast__.Import.Parsetree.attribute ‑> Ppxlib_ast__.Import.Parsetree.class_type_field`
`val text : Docstrings.text ‑> Ppxlib_ast__.Import.Parsetree.class_type_field list`