Hi,
Conflicts happen after generating separate files that are a part of the same package.
Such generated files have functions and variables with the same name which causes issues.

Example:
Lets say I have 2 files in "package example" named ex1.proto and ex2.proto.
When I run protoc --letmegrpc (...) I get var Header, var Footer, and function func NewHandler defined in both ex1.letmegrpc.go and ex2.letmegrpc.go which causes issues.

I may have a workaround for this issue.