question: the name of the placementgroup in which an amazon ec2 instance runs . placement groups are primarily used for launching high performance computing instances in the same group to ensure fast connection speeds . concode_field_sep String groupName concode_elem_sep String tenancy concode_elem_sep String availabilityZone concode_field_sep String getGroupName concode_elem_sep Placement withTenancy concode_elem_sep Placement withGroupName concode_elem_sep Placement withAvailabilityZone concode_elem_sep void setAvailabilityZone concode_elem_sep int hashCode concode_elem_sep boolean equals concode_elem_sep void setTenancy concode_elem_sep String toString concode_elem_sep String getAvailabilityZone concode_elem_sep String getTenancy
target: void function ( String arg0 ) { this . groupName = arg0 ; }