Optional
beginOptional
endIdentifies the ending offset in bytes in the generated code that relates to the identified offset. The end offset should be one past the last relevant byte (so the length of the text = end - begin).
Optional
pathIdentifies the element in the original source .proto file. This field is formatted the same as SourceCodeInfo.Location.path.
Optional
source_Identifies the filesystem path to the original source .proto.
Identifies the starting offset in bytes in the generated code that relates to the identified object.