return empty array in case namespace is not available
return empty array in case namespace is not available

apioo/psx-schema,apioo/psx-schema,apioo/psx-schema,apioo/psx-schema,apioo/psx-schema,apioo/psx-schema,apioo/psx-schema,apioo/psx-schema,apioo/psx-schema,apioo/psx-schema,apioo/psx-schema