ERROR in [default] /node_modules/graphql-typings/graphql.d.ts:990:4
'enter', which lacks return-type annotation, implicitly has an 'any' return type.
ERROR in [default] /node_modules/graphql-typings/graphql.d.ts:991:4
'leave', which lacks return-type annotation, implicitly has an 'any' return type.
Fixing
when strict-compiling.