/** Check if tokens at current position look like a mapping entry (key: value) */
private looksLikeMapping(): boolean {
if (this.peek(offset).type === TokenType.Indent) { offset++; }
if (this.peek(offset).type === TokenType.Scalar) {
offset++;
if (this.peek(offset).type === TokenType.Colon) { return true; }
}
return false;
// -- Scalar ----------------------------------------------------------