# Functions
HeaderFromMap creates a header from a map of header fields.
NewMultipartReader creates a new multipart reader reading from r using the given MIME boundary.
NewMultipartWriter returns a new multipart Writer with a random boundary, writing to w.
ReadHeader reads a MIME header from r.
WriteHeader writes a MIME header to w.
# Structs
A Header represents the key-value pairs in a message header.
MultipartReader is an iterator over parts in a MIME multipart body.
A MultipartWriter generates multipart messages.
A Part represents a single part in a multipart body.
# Interfaces
HeaderFields iterates over header fields.