Logic - do not display if value is empty

In my gridColum, I am displaying an email link, with an envelope-o icon. 

However, if the value of the field is empty or null, it's still displaying the icon.

How do I add the if logic to this code to not display the icon if the value of the field is empty or null? I've edited the code below to shorten the field recordtype! info.

a!richTextDisplayField(
  value: {
    a!richTextItem(
      text: {
        a!richTextIcon(
          icon: "envelope-o"
        ),
        a!localVariables(
          local!fullString: fv!row['recordType!technicalPointOfContact'],
          extract(
            "--beginning--" & " " & local!fullString,
            "g--",
            " <"
          )
        )
      },
      link: a!safeLink(
        uri: "mailto://" & extract(fv!row['recordType!technicalPointOfContact'], "<",">")
      )
    )
  }
)

In addition the following code is throwing "Invalid Syntax errors" 

  link: a!safeLink(
        uri: "mailto://" & extract(fv!row['recordType!technicalPointOfContact'], "<",">")
      ),
   linkStyle: "STANDALONE" <--- invalid syntax???
   )

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