common/src/main/java/lighthouse/protocol/LHProtos.java
public Builder clearEmail() {
        bitField0_ = (bitField0_ & ~0x00000010);
        email_ = getDefaultInstance().getEmail();
        onChanged();
        return this;
      }
/**
       * <code>optional string email = 5;</code>
       */
optional string email = 5.
optional string email = 5 .
public Builder clearEmail() {
        bitField0_ = (bitField0_ & ~0x00000010);
        email_ = getDefaultInstance().getEmail();
        onChanged();
        return this;
      }
public Builder clearEmail ( ) { bitField0_ = ( bitField0_ & ~ 0x00000010 ) ; email_ = getDefaultInstance ( ) . getEmail ( ) ; onChanged ( ) ; return this ; }
<code>optional string email = 5;</code>
<code > optional string email = 5 ; < / code >