add position validate for completion help blockers
add position validate for completion help blockers

hippich/typescript,mbebenita/shumway.ts,popravich/typescript,fdecampredon/jsx-typescript-old-version,hippich/typescript,hippich/typescript,popravich/typescript,fdecampredon/jsx-typescript-old-version,mbebenita/shumway.ts,mbebenita/shumway.ts,popravich/typescript,fdecampredon/jsx-typescript-old-version