presto-plugin-toolkit/src/main/java/io/prestosql/plugin/base/security/FileBasedSystemAccessControl.java/FileBasedSystemAccessControl/filterSchemas
class FileBasedSystemAccessControl:    @Override
    public Set<String> filterSchemas(SystemSecurityContext context, String catalogName, Set<String> schemaNames)
    {
        if (!canAccessCatalog(context.getIdentity(), catalogName, READ_ONLY)) {
            return ImmutableSet.of();
        }

        return schemaNames;
    }