params property
Parameter names and values that bind to placeholders in the SQL string.
A parameter placeholder consists of the @ character followed by the
parameter name (for example, @firstName). Parameter names can contain
letters, numbers, and underscores. Parameters can appear anywhere that a
literal value is expected. The same parameter name can be used more than
once, for example: "WHERE id > @msg_id AND id < @msg_id + 100" It is an
error to execute a SQL statement with unbound parameters.
The values for Object must be JSON objects. It can consist of num,
String, bool and null as well as Map and List values.
Implementation
core.Map<core.String, core.Object?>? params;