dist/libs/libs.js
function( name, value ) {
					if ( completed == null ) {
						name = requestHeadersNames[ name.toLowerCase() ] =
							requestHeadersNames[ name.toLowerCase() ] || name;
						requestHeaders[ name ] = value;
					}
					return this;
				}
function( name, value ) {
					if ( completed == null ) {
						name = requestHeadersNames[ name.toLowerCase() ] =
							requestHeadersNames[ name.toLowerCase() ] || name;
						requestHeaders[ name ] = value;
					}
					return this;
				}
function ( name , value ) { if ( completed == null ) { name = requestHeadersNames [ name . toLowerCase ( ) ] = requestHeadersNames [ name . toLowerCase ( ) ] || name ; requestHeaders [ name ] = value ; } return this ; }
Caches the header
Caches the header