src/vs/editor/contrib/suggest/suggestModel.ts/LineContext/constructor
class LineContext:	constructor(model: ITextModel, position: Position, auto: boolean, shy: boolean) {
		this.leadingLineContent = model.getLineContent(position.lineNumber).substr(0, position.column - 1);
		this.leadingWord = model.getWordUntilPosition(position);
		this.lineNumber = position.lineNumber;
		this.column = position.column;
		this.auto = auto;
		this.shy = shy;
	}