

# EnvelopeHeader class


## Constructors

[EnvelopeHeader](../package-fidl_fidl/EnvelopeHeader/EnvelopeHeader.md) (int numBytes, int numHandles, [EnvelopePresence](../package-fidl_fidl/EnvelopePresence.md) presence, [EnvelopeContentLocation](../package-fidl_fidl/EnvelopeContentLocation.md) contentLocation)

   
## Properties

##### [contentLocation](../package-fidl_fidl/EnvelopeHeader/contentLocation.md) &#8596; [EnvelopeContentLocation](../package-fidl_fidl/EnvelopeContentLocation.md)


_read / write_


##### [hashCode](../package-fidl_fidl/EnvelopeHeader/hashCode.md) &#8594; int


The hash code for this object.  
_read-only, inherited_


##### [numBytes](../package-fidl_fidl/EnvelopeHeader/numBytes.md) &#8596; int


_read / write_


##### [numHandles](../package-fidl_fidl/EnvelopeHeader/numHandles.md) &#8596; int


_read / write_


##### [presence](../package-fidl_fidl/EnvelopeHeader/presence.md) &#8596; [EnvelopePresence](../package-fidl_fidl/EnvelopePresence.md)


_read / write_


##### [runtimeType](../package-fidl_fidl/EnvelopeHeader/runtimeType.md) &#8594; Type


A representation of the runtime type of the object.  
_read-only, inherited_


## Methods

##### [noSuchMethod](../package-fidl_fidl/EnvelopeHeader/noSuchMethod.md)(Invocation invocation) dynamic


Invoked when a non-existent method or property is accessed.  
_inherited_


##### [toString](../package-fidl_fidl/EnvelopeHeader/toString.md)() String


A string representation of this object.  
_inherited_


## Operators

##### [operator ==](../package-fidl_fidl/EnvelopeHeader/operator_equals.md)(Object other) bool


The equality operator.  
_inherited_