Function parseLeadingComments

parseLeadingComments(node, sourceFile): {
    comments: string[];
    lastComment: string;
    lastParsed: comment_parser.Block;
    parsed: comment_parser.Block[];
}
Parses all leading JSDoc like block comments for the given Node.
Parameters
- node: Node
  Node being processed.
- sourceFile: SourceFile
  The source file of the Node.
Returns {
    comments: string[];
    lastComment: string;
    lastParsed: comment_parser.Block;
    parsed: comment_parser.Block[];
}
The parsed leading comments.
- comments: string[]
- lastComment: string
- lastParsed: comment_parser.Block
- parsed: comment_parser.Block[]