our $is_File = hash {
field blobId => $JMAP::Validation::Checks::String::is_id;
field type => $JMAP::Validation::Checks::String::is_string_or_null;
field name => $JMAP::Validation::Checks::String::is_string_or_null;
field size => $JMAP::Validation::Checks::Number::is_number_or_null;
end();
};
1;