src/utils/CodeBuilder.js/CodeBuilder/addLineAtStart
class CodeBuilder:	addLineAtStart ( line ) {
		if ( this.first === BLOCK ) {
			this.result = `${line}\n\n${this.result}`;
		} else if ( this.first === LINE ) {
			this.result = `${line}\n${this.result}`;
		} else {
			this.result += line;
		}

		this.first = LINE;
		if ( !this.last ) this.last = LINE;
	}