Bash echo if verbose function

################################################################################
# Function:     echo_if_verbose
# Description:  Prints $@ if IS_VERBOSE is not empty
# Arguments:    $@ :- Content to echo if ${IS_VERBOSE} is not empty
# Requires:     ${IS_VERBOSE} set to a non-empty string if verbose is on
# Outputs:      Prints $@ if ${IS_VERBOSE} is not empty
function echo_if_verbose {
    if [ -n "${IS_VERBOSE}" ]; then
        echo "$@"
    fi
}