The generated file name.
The decoded mappings as an array of line arrays. Each line is an array of segments, where each segment is [generatedColumn, sourceIndex, originalLine, originalColumn, nameIndex?].
The list of symbol names used in mappings.
The list of original source files.
The original source contents (if includeContent was true).
The source map version (always 3).
A decoded source map with mappings as an array of arrays instead of VLQ-encoded string.