public int getSourceFileIndex() {
		return sourceFileIndex & 0xffff;
	}
The value of the sourcefile_index item must be a valid index into the
constant_pool table. The constant pool entry at that index must be a
CONSTANT_Utf8_info structure representing a string.
<p>
The string referenced by the sourcefile_index item will be interpreted as
indicating the name of the source file from which this class file was compiled.
It will not be interpreted as indicating the name of a directory containing the
file or an absolute path name for the file; such platform-specific additional
information must be supplied by the runtime interpreter or development tool
at the time the file name is actually used.
@return a valid index into the constant_pool table
Ghidra/Processors/JVM/src/main/java/ghidra/javaclass/format/attributes/SourceFileAttribute.java