presto-plugin-toolkit/src/main/java/io/prestosql/plugin/base/security/SchemaAccessControlRule.java/SchemaAccessControlRule/SchemaAccessControlRule
class SchemaAccessControlRule:    @JsonCreator
    public SchemaAccessControlRule(
            @JsonProperty("owner") boolean owner,
            @JsonProperty("user") Optional<Pattern> userRegex,
            @JsonProperty("schema") Optional<Pattern> schemaRegex)
    {
        this.owner = owner;
        this.userRegex = requireNonNull(userRegex, "userRegex is null");
        this.schemaRegex = requireNonNull(schemaRegex, "sourceRegex is null");
    }