compile method
Implementation
void compile(StringBuffer buf, int indent) {
var i = 0;
_columns.forEach((name, column) {
var col = MariaDbGenerator.compileColumn(column);
if (i++ > 0) buf.writeln(',');
for (var i = 0; i < indent; i++) {
buf.write(' ');
}
buf.write('$name $col');
});
}