// The 'M' Bit, known as the Mandatory bit, indicates whether support of the AVP is required. If an AVP with the 'M' bit set is received by
// a Diameter client, server, proxy, or translation agent and either the AVP or its value is unrecognized, the message MUST be rejected.
// Diameter Relay and redirect agents MUST NOT reject messages with unrecognized AVPs.
// The 'M' Bit, known as the Mandatory bit, indicates whether support of the AVP is required. If an AVP with the 'M' bit set is received by
// a Diameter client, server, proxy, or translation agent and either the AVP or its value is unrecognized, the message MUST be rejected.
// Diameter Relay and redirect agents MUST NOT reject messages with unrecognized AVPs.